121212002010021 has 64 divisors (see below), whose sum is σ = 184827588556800. Its totient is φ = 70043230911744.

The previous prime is 121212002009927. The next prime is 121212002010031. The reversal of 121212002010021 is 120010200212121.

It is not a de Polignac number, because 121212002010021 - 2⁷ = 121212002009893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212002010031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62178496 + ... + 64098278.

It is an arithmetic number, because the mean of its divisors is an integer number (2887931071200).

Almost surely, 2^{121212002010021} is an apocalyptic number.

It is an amenable number.

121212002010021 is a deficient number, since it is larger than the sum of its proper divisors (63615586546779).

121212002010021 is a wasteful number, since it uses less digits than its factorization.

121212002010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920570.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121212002010021 its reverse (120010200212121), we get a palindrome (241222202222142).

The spelling of 121212002010021 in words is "one hundred twenty-one trillion, two hundred twelve billion, two million, ten thousand, twenty-one".