311212001020 has 24 divisors (see below), whose sum is σ = 662750067168. Its totient is φ = 122731492800.

The previous prime is 311212001003. The next prime is 311212001027. The reversal of 311212001020 is 20100212113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311212001027) 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, 109580271 + ... + 109583110.

It is an arithmetic number, because the mean of its divisors is an integer number (27614586132).

Almost surely, 2^311212001020 is an apocalyptic number.

It is an amenable number.

311212001020 is an abundant number, since it is smaller than the sum of its proper divisors (351538066148).

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

311212001020 is a wasteful number, since it uses less digits than its factorization.

311212001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219163461 (or 219163459 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 311212001020 its reverse (20100212113), we get a palindrome (331312213133).

The spelling of 311212001020 in words is "three hundred eleven billion, two hundred twelve million, one thousand, twenty".