31121011333132 has 18 divisors (see below), whose sum is σ = 63353487357132. Its totient is φ = 13337576285544.

The previous prime is 31121011333123. The next prime is 31121011333163. The reversal of 31121011333132 is 23133311012113.

It is a junction number, because it is equal to n+sod(n) for n = 31121011333097 and 31121011333106.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79390334838 + ... + 79390335229.

Almost surely, 2^{31121011333132} is an apocalyptic number.

It is an amenable number.

31121011333132 is an abundant number, since it is smaller than the sum of its proper divisors (32232476024000).

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

31121011333132 is a wasteful number, since it uses less digits than its factorization.

31121011333132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158780670085 (or 158780670076 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31121011333132 its reverse (23133311012113), we get a palindrome (54254322345245).

The spelling of 31121011333132 in words is "thirty-one trillion, one hundred twenty-one billion, eleven million, three hundred thirty-three thousand, one hundred thirty-two".