121012112001020 has 24 divisors (see below), whose sum is σ = 258432645970800. Its totient is φ = 47584423701632.

The previous prime is 121012112000993. The next prime is 121012112001023. The reversal of 121012112001020 is 20100211210121.

It is a junction number, because it is equal to n+sod(n) for n = 121012112000986 and 121012112001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012112001023) 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, 51276317465 + ... + 51276319824.

It is an arithmetic number, because the mean of its divisors is an integer number (10768026915450).

Almost surely, 2^{121012112001020} is an apocalyptic number.

121012112001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012112001020 is an abundant number, since it is smaller than the sum of its proper divisors (137420533969780).

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

121012112001020 is a wasteful number, since it uses less digits than its factorization.

121012112001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102552637357 (or 102552637355 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121012112001020 its reverse (20100211210121), we get a palindrome (141112323211141).

The spelling of 121012112001020 in words is "one hundred twenty-one trillion, twelve billion, one hundred twelve million, one thousand, twenty".