121021210001020 has 48 divisors (see below), whose sum is σ = 290455247936448. Its totient is φ = 41492365724160.

The previous prime is 121021210000967. The next prime is 121021210001047. The reversal of 121021210001020 is 20100012120121.

It is a super-2 number, since 2×121021210001020² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2979240 + ... + 15840400.

It is an arithmetic number, because the mean of its divisors is an integer number (6051150998676).

Almost surely, 2^{121021210001020} is an apocalyptic number.

121021210001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021210001020 is an abundant number, since it is smaller than the sum of its proper divisors (169434037935428).

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

121021210001020 is a wasteful number, since it uses less digits than its factorization.

121021210001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12928390 (or 12928388 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121021210001020 its reverse (20100012120121), we get a palindrome (141121222121141).

The spelling of 121021210001020 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred ten million, one thousand, twenty".