21012223010 has 16 divisors (see below), whose sum is σ = 37828619136. Its totient is φ = 8403418608.

The previous prime is 21012222991. The next prime is 21012223021. The reversal of 21012223010 is 1032221012.

It is a happy 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, 122852 + ... + 238991.

It is an arithmetic number, because the mean of its divisors is an integer number (2364288696).

Almost surely, 2^21012223010 is an apocalyptic number.

21012223010 is a deficient number, since it is larger than the sum of its proper divisors (16816396126).

21012223010 is a wasteful number, since it uses less digits than its factorization.

21012223010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367657.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21012223010 its reverse (1032221012), we get a palindrome (22044444022).

The spelling of 21012223010 in words is "twenty-one billion, twelve million, two hundred twenty-three thousand, ten".