1020312100981 has 2 divisors, whose sum is σ = 1020312100982. Its totient is φ = 1020312100980.

The previous prime is 1020312100889. The next prime is 1020312100999. The reversal of 1020312100981 is 1890012130201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1010537615025 + 9774485956 = 1005255^2 + 98866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020312100981 - 2²⁹ = 1019775230069 is a prime.

It is a super-3 number, since 3×1020312100981³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020312100481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510156050490 + 510156050491.

It is an arithmetic number, because the mean of its divisors is an integer number (510156050491).

Almost surely, 2^{1020312100981} is an apocalyptic number.

It is an amenable number.

1020312100981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020312100981 is an equidigital number, since it uses as much as digits as its factorization.

1020312100981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 1020312100981 in words is "one trillion, twenty billion, three hundred twelve million, one hundred thousand, nine hundred eighty-one".