21001122011110 has 16 divisors (see below), whose sum is σ = 37815632208576. Its totient is φ = 8397423784768.

The previous prime is 21001122011101. The next prime is 21001122011143. The reversal of 21001122011110 is 1111022110012.

It is a happy number.

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, 378098302 + ... + 378153841.

It is an arithmetic number, because the mean of its divisors is an integer number (2363477013036).

Almost surely, 2^{21001122011110} is an apocalyptic number.

21001122011110 is a deficient number, since it is larger than the sum of its proper divisors (16814510197466).

21001122011110 is a wasteful number, since it uses less digits than its factorization.

21001122011110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756254927.

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

Adding to 21001122011110 its reverse (1111022110012), we get a palindrome (22112144121122).

The spelling of 21001122011110 in words is "twenty-one trillion, one billion, one hundred twenty-two million, eleven thousand, one hundred ten".