121210120202020 has 24 divisors (see below), whose sum is σ = 257061462848568. Its totient is φ = 48004008000000.

The previous prime is 121210120201987. The next prime is 121210120202029. The reversal of 121210120202020 is 20202021012121.

It is a happy number.

121210120202020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 21131544772836 + 100078575429184 = 4596906^2 + 10003928^2 .

It is a super-2 number, since 2×121210120202020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121210120201985 and 121210120202003.

It is not an unprimeable number, because it can be changed into a prime (121210120202029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30002502981 + ... + 30002507020.

It is an arithmetic number, because the mean of its divisors is an integer number (10710894285357).

Almost surely, 2^{121210120202020} is an apocalyptic number.

121210120202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210120202020 is an abundant number, since it is smaller than the sum of its proper divisors (135851342646548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121210120202020 is a wasteful number, since it uses less digits than its factorization.

121210120202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60005010111 (or 60005010109 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121210120202020 its reverse (20202021012121), we get a palindrome (141412141214141).

The spelling of 121210120202020 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty million, two hundred two thousand, twenty".