311123011020 has 48 divisors (see below), whose sum is σ = 876011189760. Its totient is φ = 82502635456.

The previous prime is 311123010983. The next prime is 311123011057. The reversal of 311123011020 is 20110321113.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (311123010983) and next prime (311123011057).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14473572 + ... + 14495051.

It is an arithmetic number, because the mean of its divisors is an integer number (18250233120).

Almost surely, 2^311123011020 is an apocalyptic number.

311123011020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311123011020 is an abundant number, since it is smaller than the sum of its proper divisors (564888178740).

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

311123011020 is a wasteful number, since it uses less digits than its factorization.

311123011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28968814 (or 28968812 counting only the distinct ones).

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

Adding to 311123011020 its reverse (20110321113), we get a palindrome (331233332133).

The spelling of 311123011020 in words is "three hundred eleven billion, one hundred twenty-three million, eleven thousand, twenty".