21201002111110 has 32 divisors (see below), whose sum is σ = 38732289841152. Its totient is φ = 8353632096480.

The previous prime is 21201002111057. The next prime is 21201002111111. The reversal of 21201002111110 is 1111120010212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201002111111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30139305 + ... + 30834715.

It is an arithmetic number, because the mean of its divisors is an integer number (1210384057536).

Almost surely, 2^{21201002111110} is an apocalyptic number.

21201002111110 is a deficient number, since it is larger than the sum of its proper divisors (17531287730042).

21201002111110 is a wasteful number, since it uses less digits than its factorization.

21201002111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740988.

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

Adding to 21201002111110 its reverse (1111120010212), we get a palindrome (22312122121322).

The spelling of 21201002111110 in words is "twenty-one trillion, two hundred one billion, two million, one hundred eleven thousand, one hundred ten".