200021313021731 has 2 divisors, whose sum is σ = 200021313021732. Its totient is φ = 200021313021730.

The previous prime is 200021313021697. The next prime is 200021313021757. The reversal of 200021313021731 is 137120313120002.

It is an a-pointer prime, because the next prime (200021313021757) can be obtained adding 200021313021731 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 200021313021731 - 2³⁰ = 200020239279907 is a prime.

It is a super-2 number, since 2×200021313021731² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 200021313021731.

It is not a weakly prime, because it can be changed into another prime (200021313071731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010656510865 + 100010656510866.

It is an arithmetic number, because the mean of its divisors is an integer number (100010656510866).

Almost surely, 2^{200021313021731} is an apocalyptic number.

200021313021731 is a deficient number, since it is larger than the sum of its proper divisors (1).

200021313021731 is an equidigital number, since it uses as much as digits as its factorization.

200021313021731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 200021313021731 its reverse (137120313120002), we get a palindrome (337141626141733).

The spelling of 200021313021731 in words is "two hundred trillion, twenty-one billion, three hundred thirteen million, twenty-one thousand, seven hundred thirty-one".