21311010222 has 32 divisors (see below), whose sum is σ = 42916443648. Its totient is φ = 7054667136.

The previous prime is 21311010211. The next prime is 21311010241. The reversal of 21311010222 is 22201011312.

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, 1384038 + ... + 1399350.

It is an arithmetic number, because the mean of its divisors is an integer number (1341138864).

Almost surely, 2^21311010222 is an apocalyptic number.

21311010222 is an abundant number, since it is smaller than the sum of its proper divisors (21605433426).

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

21311010222 is a wasteful number, since it uses less digits than its factorization.

21311010222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16904.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21311010222 its reverse (22201011312), we get a palindrome (43512021534).

The spelling of 21311010222 in words is "twenty-one billion, three hundred eleven million, ten thousand, two hundred twenty-two".