21121000201002 has 16 divisors (see below), whose sum is σ = 45491385048480. Its totient is φ = 6498769292592.

The previous prime is 21121000200977. The next prime is 21121000201033. The reversal of 21121000201002 is 20010200012112.

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, 135391026852 + ... + 135391027007.

It is an arithmetic number, because the mean of its divisors is an integer number (2843211565530).

Almost surely, 2^{21121000201002} is an apocalyptic number.

21121000201002 is an abundant number, since it is smaller than the sum of its proper divisors (24370384847478).

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

21121000201002 is a wasteful number, since it uses less digits than its factorization.

21121000201002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270782053877.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21121000201002 its reverse (20010200012112), we get a palindrome (41131200213114).

The spelling of 21121000201002 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred one thousand, two".