31211224442 has 8 divisors (see below), whose sum is σ = 46828497600. Its totient is φ = 15601725244.

The previous prime is 31211224433. The next prime is 31211224463. The reversal of 31211224442 is 24442211213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31211224442² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1933442 + ... + 1949517.

It is an arithmetic number, because the mean of its divisors is an integer number (5853562200).

Almost surely, 2^31211224442 is an apocalyptic number.

31211224442 is a deficient number, since it is larger than the sum of its proper divisors (15617273158).

31211224442 is a wasteful number, since it uses less digits than its factorization.

31211224442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3886980.

The product of its digits is 3072, while the sum is 26.

Adding to 31211224442 its reverse (24442211213), we get a palindrome (55653435655).

The spelling of 31211224442 in words is "thirty-one billion, two hundred eleven million, two hundred twenty-four thousand, four hundred forty-two".