21101011011010 has 64 divisors (see below), whose sum is σ = 43501108838400. Its totient is φ = 7219089496512.

The previous prime is 21101011011007. The next prime is 21101011011023. The reversal of 21101011011010 is 1011011010112.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107057331 + ... + 107254249.

It is an arithmetic number, because the mean of its divisors is an integer number (679704825600).

Almost surely, 2^{21101011011010} is an apocalyptic number.

21101011011010 is an abundant number, since it is smaller than the sum of its proper divisors (22400097827390).

21101011011010 is a wasteful number, since it uses less digits than its factorization.

21101011011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200215.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 21101011011010 its reverse (1011011010112), we get a palindrome (22112022021122).

The spelling of 21101011011010 in words is "twenty-one trillion, one hundred one billion, eleven million, eleven thousand, ten".