1020010920251 has 2 divisors, whose sum is σ = 1020010920252. Its totient is φ = 1020010920250.

The previous prime is 1020010920193. The next prime is 1020010920391. The reversal of 1020010920251 is 1520290100201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020010920251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020010923251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510005460125 + 510005460126.

It is an arithmetic number, because the mean of its divisors is an integer number (510005460126).

Almost surely, 2^{1020010920251} is an apocalyptic number.

1020010920251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020010920251 is an equidigital number, since it uses as much as digits as its factorization.

1020010920251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The spelling of 1020010920251 in words is "one trillion, twenty billion, ten million, nine hundred twenty thousand, two hundred fifty-one".