21002111012210 has 16 divisors (see below), whose sum is σ = 37889135721216. Its totient is φ = 8381880871728.

The previous prime is 21002111012171. The next prime is 21002111012221. The reversal of 21002111012210 is 1221011120012.

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, 2370436994 + ... + 2370445853.

It is an arithmetic number, because the mean of its divisors is an integer number (2368070982576).

Almost surely, 2^{21002111012210} is an apocalyptic number.

21002111012210 is a deficient number, since it is larger than the sum of its proper divisors (16887024709006).

21002111012210 is a wasteful number, since it uses less digits than its factorization.

21002111012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4740883297.

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

Adding to 21002111012210 its reverse (1221011120012), we get a palindrome (22223122132222).

The spelling of 21002111012210 in words is "twenty-one trillion, two billion, one hundred eleven million, twelve thousand, two hundred ten".