31102203020 has 48 divisors (see below), whose sum is σ = 74719606080. Its totient is φ = 10652995584.

The previous prime is 31102202993. The next prime is 31102203029. The reversal of 31102203020 is 2030220113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 31102202986 and 31102203004.

It is not an unprimeable number, because it can be changed into a prime (31102203029) 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, 31172 + ... + 251348.

It is an arithmetic number, because the mean of its divisors is an integer number (1556658460).

Almost surely, 2^31102203020 is an apocalyptic number.

It is an amenable number.

31102203020 is an abundant number, since it is smaller than the sum of its proper divisors (43617403060).

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

31102203020 is a wasteful number, since it uses less digits than its factorization.

31102203020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221202 (or 221200 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31102203020 its reverse (2030220113), we get a palindrome (33132423133).

The spelling of 31102203020 in words is "thirty-one billion, one hundred two million, two hundred three thousand, twenty".