121012200220020 has 48 divisors (see below), whose sum is σ = 338836629098688. Its totient is φ = 32269684965120.

The previous prime is 121012200219959. The next prime is 121012200220027. The reversal of 121012200220020 is 20022002210121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012200220027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036872 + ... + 15591648.

It is an arithmetic number, because the mean of its divisors is an integer number (7059096439556).

Almost surely, 2^{121012200220020} is an apocalyptic number.

121012200220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012200220020 is an abundant number, since it is smaller than the sum of its proper divisors (217824428878668).

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

121012200220020 is a wasteful number, since it uses less digits than its factorization.

121012200220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14693360 (or 14693358 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121012200220020 its reverse (20022002210121), we get a palindrome (141034202430141).

The spelling of 121012200220020 in words is "one hundred twenty-one trillion, twelve billion, two hundred million, two hundred twenty thousand, twenty".