31210020212 has 36 divisors (see below), whose sum is σ = 63545440644. Its totient is φ = 13373458560.

The previous prime is 31210020203. The next prime is 31210020241. The reversal of 31210020212 is 21202001213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6399360016 + 24810660196 = 79996^2 + 157514^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1704128 + ... + 1722344.

It is an arithmetic number, because the mean of its divisors is an integer number (1765151129).

Almost surely, 2^31210020212 is an apocalyptic number.

It is an amenable number.

31210020212 is an abundant number, since it is smaller than the sum of its proper divisors (32335420432).

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

31210020212 is a wasteful number, since it uses less digits than its factorization.

31210020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26976 (or 26967 counting only the distinct ones).

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

Adding to 31210020212 its reverse (21202001213), we get a palindrome (52412021425).

The spelling of 31210020212 in words is "thirty-one billion, two hundred ten million, twenty thousand, two hundred twelve".