21101112211010 has 32 divisors (see below), whose sum is σ = 40920618381552. Its totient is φ = 7787956285440.

The previous prime is 21101112210929. The next prime is 21101112211031. The reversal of 21101112211010 is 1011221110112.

It can be written as a sum of positive squares in 8 ways, for example, as 7384170368689 + 13716941842321 = 2717383^2 + 3703639^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33263831 + ... + 33892250.

Almost surely, 2^{21101112211010} is an apocalyptic number.

21101112211010 is a deficient number, since it is larger than the sum of its proper divisors (19819506170542).

21101112211010 is a wasteful number, since it uses less digits than its factorization.

21101112211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67158518.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21101112211010 its reverse (1011221110112), we get a palindrome (22112333321122).

The spelling of 21101112211010 in words is "twenty-one trillion, one hundred one billion, one hundred twelve million, two hundred eleven thousand, ten".