21221133010 has 64 divisors (see below), whose sum is σ = 48785151744. Its totient is φ = 6453043200.

The previous prime is 21221132993. The next prime is 21221133019. The reversal of 21221133010 is 1033112212.

It is a super-2 number, since 2×21221133010² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21221133019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304527 + ... + 367666.

It is an arithmetic number, because the mean of its divisors is an integer number (762267996).

Almost surely, 2^21221133010 is an apocalyptic number.

21221133010 is an abundant number, since it is smaller than the sum of its proper divisors (27564018734).

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

21221133010 is a wasteful number, since it uses less digits than its factorization.

21221133010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672259.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21221133010 its reverse (1033112212), we get a palindrome (22254245222).

The spelling of 21221133010 in words is "twenty-one billion, two hundred twenty-one million, one hundred thirty-three thousand, ten".