121101202020 has 96 divisors (see below), whose sum is σ = 354818838528. Its totient is φ = 30827976192.

The previous prime is 121101202003. The next prime is 121101202021. The reversal of 121101202020 is 20202101121.

It is a super-2 number, since 2×121101202020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121101201987 and 121101202005.

It is not an unprimeable number, because it can be changed into a prime (121101202021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 396964 + ... + 632283.

It is an arithmetic number, because the mean of its divisors is an integer number (3696029568).

Almost surely, 2^121101202020 is an apocalyptic number.

121101202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101202020 is an abundant number, since it is smaller than the sum of its proper divisors (233717636508).

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

121101202020 is a wasteful number, since it uses less digits than its factorization.

121101202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029349 (or 1029347 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121101202020 its reverse (20202101121), we get a palindrome (141303303141).

The spelling of 121101202020 in words is "one hundred twenty-one billion, one hundred one million, two hundred two thousand, twenty".