31122210020 has 24 divisors (see below), whose sum is σ = 71298154368. Its totient is φ = 11317167200.

The previous prime is 31122210019. The next prime is 31122210023. The reversal of 31122210020 is 2001222113.

It is a happy number.

It is a super-3 number, since 3×31122210020³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31122209977 and 31122210004.

It is not an unprimeable number, because it can be changed into a prime (31122210023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70732076 + ... + 70732515.

It is an arithmetic number, because the mean of its divisors is an integer number (2970756432).

Almost surely, 2^31122210020 is an apocalyptic number.

It is an amenable number.

31122210020 is an abundant number, since it is smaller than the sum of its proper divisors (40175944348).

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

31122210020 is a wasteful number, since it uses less digits than its factorization.

31122210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141464611 (or 141464609 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31122210020 its reverse (2001222113), we get a palindrome (33123432133).

It can be divided in two parts, 31122 and 210020, that added together give a palindrome (241142).

The spelling of 31122210020 in words is "thirty-one billion, one hundred twenty-two million, two hundred ten thousand, twenty".