311303021012 has 6 divisors (see below), whose sum is σ = 544780286778. Its totient is φ = 155651510504.

The previous prime is 311303020997. The next prime is 311303021027. The reversal of 311303021012 is 210120303113.

It is an interprime number because it is at equal distance from previous prime (311303020997) and next prime (311303021027).

It can be written as a sum of positive squares in only one way, i.e., 304865205316 + 6437815696 = 552146^2 + 80236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38912877623 + ... + 38912877630.

It is an arithmetic number, because the mean of its divisors is an integer number (90796714463).

Almost surely, 2^311303021012 is an apocalyptic number.

It is an amenable number.

311303021012 is a deficient number, since it is larger than the sum of its proper divisors (233477265766).

311303021012 is a wasteful number, since it uses less digits than its factorization.

311303021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77825755257 (or 77825755255 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 311303021012 its reverse (210120303113), we get a palindrome (521423324125).

The spelling of 311303021012 in words is "three hundred eleven billion, three hundred three million, twenty-one thousand, twelve".