31231111322 has 4 divisors (see below), whose sum is σ = 46846666986. Its totient is φ = 15615555660.

The previous prime is 31231111273. The next prime is 31231111363. The reversal of 31231111322 is 22311113213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22311113213 = 41 ⋅544173493.

It can be written as a sum of positive squares in only one way, i.e., 24467529241 + 6763582081 = 156421^2 + 82241^2 .

It is a super-3 number, since 3×31231111322³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31231111294 and 31231111303.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7807777829 + ... + 7807777832.

Almost surely, 2^31231111322 is an apocalyptic number.

31231111322 is a deficient number, since it is larger than the sum of its proper divisors (15615555664).

31231111322 is a wasteful number, since it uses less digits than its factorization.

31231111322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15615555663.

The product of its digits is 216, while the sum is 20.

Adding to 31231111322 its reverse (22311113213), we get a palindrome (53542224535).

The spelling of 31231111322 in words is "thirty-one billion, two hundred thirty-one million, one hundred eleven thousand, three hundred twenty-two".