31020111242 has 8 divisors (see below), whose sum is σ = 49267235556. Its totient is φ = 14597699392.

The previous prime is 31020111209. The next prime is 31020111257. The reversal of 31020111242 is 24211102013.

It can be written as a sum of positive squares in 2 ways, for example, as 29853273961 + 1166837281 = 172781^2 + 34159^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 31020111242.

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, 456178073 + ... + 456178140.

Almost surely, 2^31020111242 is an apocalyptic number.

31020111242 is a deficient number, since it is larger than the sum of its proper divisors (18247124314).

31020111242 is a wasteful number, since it uses less digits than its factorization.

31020111242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912356232.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 31020111242 its reverse (24211102013), we get a palindrome (55231213255).

The spelling of 31020111242 in words is "thirty-one billion, twenty million, one hundred eleven thousand, two hundred forty-two".