21237161110 has 32 divisors (see below), whose sum is σ = 41752910592. Its totient is φ = 7713187680.

The previous prime is 21237161069. The next prime is 21237161111. The reversal of 21237161110 is 1116173212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21237161111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26764 + ... + 207823.

It is an arithmetic number, because the mean of its divisors is an integer number (1304778456).

Almost surely, 2^21237161110 is an apocalyptic number.

21237161110 is a deficient number, since it is larger than the sum of its proper divisors (20515749482).

21237161110 is a wasteful number, since it uses less digits than its factorization.

21237161110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235428.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 21237161110 in words is "twenty-one billion, two hundred thirty-seven million, one hundred sixty-one thousand, one hundred ten".