31101130212 has 24 divisors (see below), whose sum is σ = 72587340000. Its totient is φ = 10364466816.

The previous prime is 31101130211. The next prime is 31101130217. The reversal of 31101130212 is 21203110113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31101130191 and 31101130200.

It is not an unprimeable number, because it can be changed into a prime (31101130211) 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, 271462 + ... + 368637.

It is an arithmetic number, because the mean of its divisors is an integer number (3024472500).

Almost surely, 2^31101130212 is an apocalyptic number.

It is an amenable number.

31101130212 is an abundant number, since it is smaller than the sum of its proper divisors (41486209788).

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

31101130212 is a wasteful number, since it uses less digits than its factorization.

31101130212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644155 (or 644153 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31101130212 its reverse (21203110113), we get a palindrome (52304240325).

The spelling of 31101130212 in words is "thirty-one billion, one hundred one million, one hundred thirty thousand, two hundred twelve".