21120121021002 has 16 divisors (see below), whose sum is σ = 42240313537920. Its totient is φ = 7040028424352.

The previous prime is 21120121020953. The next prime is 21120121021031. The reversal of 21120121021002 is 20012012102112.

It is a super-3 number, since 3×21120121021002³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1343758 + ... + 6636710.

It is an arithmetic number, because the mean of its divisors is an integer number (2640019596120).

Almost surely, 2^{21120121021002} is an apocalyptic number.

21120121021002 is an abundant number, since it is smaller than the sum of its proper divisors (21120192516918).

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

21120121021002 is a wasteful number, since it uses less digits than its factorization.

21120121021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5957997.

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

Adding to 21120121021002 its reverse (20012012102112), we get a palindrome (41132133123114).

The spelling of 21120121021002 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty-one million, twenty-one thousand, two".