21121101002110 has 16 divisors (see below), whose sum is σ = 38032420887216. Its totient is φ = 8445231715648.

The previous prime is 21121101001961. The next prime is 21121101002123. The reversal of 21121101002110 is 1120010112112.

It is a happy number.

It is a super-2 number, since 2×21121101002110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 401058004 + ... + 401110663.

It is an arithmetic number, because the mean of its divisors is an integer number (2377026305451).

Almost surely, 2^{21121101002110} is an apocalyptic number.

21121101002110 is a deficient number, since it is larger than the sum of its proper divisors (16911319885106).

21121101002110 is a wasteful number, since it uses less digits than its factorization.

21121101002110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802171307.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21121101002110 its reverse (1120010112112), we get a palindrome (22241111114222).

The spelling of 21121101002110 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred one million, two thousand, one hundred ten".