121011102001020 has 192 divisors, whose sum is σ = 422931697284096. Its totient is φ = 25115822315520.

The previous prime is 121011102000991. The next prime is 121011102001039. The reversal of 121011102001020 is 20100201110121.

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 = 121011102000987 and 121011102001005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11322387 + ... + 19241066.

It is an arithmetic number, because the mean of its divisors is an integer number (2202769256688).

Almost surely, 2^{121011102001020} is an apocalyptic number.

121011102001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121011102001020 is an abundant number, since it is smaller than the sum of its proper divisors (301920595283076).

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

121011102001020 is a wasteful number, since it uses less digits than its factorization.

121011102001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30564340 (or 30564338 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121011102001020 its reverse (20100201110121), we get a palindrome (141111303111141).

The spelling of 121011102001020 in words is "one hundred twenty-one trillion, eleven billion, one hundred two million, one thousand, twenty".