21221010010110 has 32 divisors (see below), whose sum is σ = 53610972658560. Its totient is φ = 5361097265568.

The previous prime is 21221010010073. The next prime is 21221010010139. The reversal of 21221010010110 is 1101001012212.

It is a Curzon number.

It is a congruent number.

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, 18614920492 + ... + 18614921631.

It is an arithmetic number, because the mean of its divisors is an integer number (1675342895580).

Almost surely, 2^{21221010010110} is an apocalyptic number.

21221010010110 is an abundant number, since it is smaller than the sum of its proper divisors (32389962648450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221010010110 is a wasteful number, since it uses less digits than its factorization.

21221010010110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37229842152.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21221010010110 its reverse (1101001012212), we get a palindrome (22322011022322).

The spelling of 21221010010110 in words is "twenty-one trillion, two hundred twenty-one billion, ten million, ten thousand, one hundred ten".