311000210012021 has 16 divisors (see below), whose sum is σ = 312851901875760. Its totient is φ = 309153092075520.

The previous prime is 311000210011969. The next prime is 311000210012033. The reversal of 311000210012021 is 120210012000113.

It can be written as a sum of positive squares in 8 ways, for example, as 3281568480100 + 307718641531921 = 1811510^2 + 17541911^2 .

It is a cyclic number.

It is not a de Polignac number, because 311000210012021 - 2³⁰ = 310999136270197 is a prime.

It is a super-2 number, since 2×311000210012021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311000210011987 and 311000210012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311000210032021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 945236981 + ... + 945565941.

It is an arithmetic number, because the mean of its divisors is an integer number (19553243867235).

Almost surely, 2^{311000210012021} is an apocalyptic number.

It is an amenable number.

311000210012021 is a deficient number, since it is larger than the sum of its proper divisors (1851691863739).

311000210012021 is a wasteful number, since it uses less digits than its factorization.

311000210012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335896.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 311000210012021 its reverse (120210012000113), we get a palindrome (431210222012134).

The spelling of 311000210012021 in words is "three hundred eleven trillion, two hundred ten million, twelve thousand, twenty-one".