21511200110 has 16 divisors (see below), whose sum is σ = 40403645856. Its totient is φ = 8230372128.

The previous prime is 21511200103. The next prime is 21511200143. The reversal of 21511200110 is 1100211512.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 46763249 + ... + 46763708.

It is an arithmetic number, because the mean of its divisors is an integer number (2525227866).

Almost surely, 2^21511200110 is an apocalyptic number.

21511200110 is a deficient number, since it is larger than the sum of its proper divisors (18892445746).

21511200110 is a wasteful number, since it uses less digits than its factorization.

21511200110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93526987.

The product of its (nonzero) digits is 20, while the sum is 14.

Adding to 21511200110 its reverse (1100211512), we get a palindrome (22611411622).

The spelling of 21511200110 in words is "twenty-one billion, five hundred eleven million, two hundred thousand, one hundred ten".