21231010331222 has 16 divisors (see below), whose sum is σ = 32253498795840. Its totient is φ = 10479876256512.

The previous prime is 21231010331173. The next prime is 21231010331249. The reversal of 21231010331222 is 22213301013212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6723653 + ... + 9363200.

It is an arithmetic number, because the mean of its divisors is an integer number (2015843674740).

Almost surely, 2^{21231010331222} is an apocalyptic number.

21231010331222 is a deficient number, since it is larger than the sum of its proper divisors (11022488464618).

21231010331222 is a wasteful number, since it uses less digits than its factorization.

21231010331222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16095287.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21231010331222 its reverse (22213301013212), we get a palindrome (43444311344434).

The spelling of 21231010331222 in words is "twenty-one trillion, two hundred thirty-one billion, ten million, three hundred thirty-one thousand, two hundred twenty-two".