31120220202 has 32 divisors (see below), whose sum is σ = 63047289600. Its totient is φ = 10239011328.

The previous prime is 31120220171. The next prime is 31120220203. The reversal of 31120220202 is 20202202113.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31120220203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1991074 + ... + 2006642.

It is an arithmetic number, because the mean of its divisors is an integer number (1970227800).

Almost surely, 2^31120220202 is an apocalyptic number.

31120220202 is an abundant number, since it is smaller than the sum of its proper divisors (31927069398).

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

31120220202 is a wasteful number, since it uses less digits than its factorization.

31120220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19870.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 31120220202 its reverse (20202202113), we get a palindrome (51322422315).

The spelling of 31120220202 in words is "thirty-one billion, one hundred twenty million, two hundred twenty thousand, two hundred two".