31221432102444 has 24 divisors (see below), whose sum is σ = 72971627635200. Its totient is φ = 10389769834704.

The previous prime is 31221432102337. The next prime is 31221432102451. The reversal of 31221432102444 is 44420123412213.

It is a super-2 number, since 2×31221432102444² (a number of 28 digits) contains 22 as substring.

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, 2171767444 + ... + 2171781819.

It is an arithmetic number, because the mean of its divisors is an integer number (3040484484800).

Almost surely, 2^{31221432102444} is an apocalyptic number.

It is an amenable number.

31221432102444 is an abundant number, since it is smaller than the sum of its proper divisors (41750195532756).

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

31221432102444 is a wasteful number, since it uses less digits than its factorization.

31221432102444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343549869 (or 4343549867 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 31221432102444 its reverse (44420123412213), we get a palindrome (75641555514657).

The spelling of 31221432102444 in words is "thirty-one trillion, two hundred twenty-one billion, four hundred thirty-two million, one hundred two thousand, four hundred forty-four".