10202012019961 has 2 divisors, whose sum is σ = 10202012019962. Its totient is φ = 10202012019960.

The previous prime is 10202012019959. The next prime is 10202012020019. The reversal of 10202012019961 is 16991021020201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10085419820025 + 116592199936 = 3175755^2 + 341456^2 .

It is an emirp because it is prime and its reverse (16991021020201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10202012019961 - 2¹ = 10202012019959 is a prime.

Together with 10202012019959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10202012029961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101006009980 + 5101006009981.

It is an arithmetic number, because the mean of its divisors is an integer number (5101006009981).

Almost surely, 2^{10202012019961} is an apocalyptic number.

It is an amenable number.

10202012019961 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202012019961 is an equidigital number, since it uses as much as digits as its factorization.

10202012019961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 10202012019961 in words is "ten trillion, two hundred two billion, twelve million, nineteen thousand, nine hundred sixty-one".