21023111010 has 64 divisors (see below), whose sum is σ = 55057895424. Its totient is φ = 5095070400.

The previous prime is 21023111009. The next prime is 21023111077. The reversal of 21023111010 is 1011132012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1587637 + ... + 1600823.

It is an arithmetic number, because the mean of its divisors is an integer number (860279616).

Almost surely, 2^21023111010 is an apocalyptic number.

21023111010 is an abundant number, since it is smaller than the sum of its proper divisors (34034784414).

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

21023111010 is a wasteful number, since it uses less digits than its factorization.

21023111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18039.

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

Adding to 21023111010 its reverse (1011132012), we get a palindrome (22034243022).

The spelling of 21023111010 in words is "twenty-one billion, twenty-three million, one hundred eleven thousand, ten".