210012201999961 has 2 divisors, whose sum is σ = 210012201999962. Its totient is φ = 210012201999960.

The previous prime is 210012201999953. The next prime is 210012202000039. The reversal of 210012201999961 is 169999102210012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188981218737936 + 21030983262025 = 13747044^2 + 4585955^2 .

It is a cyclic number.

It is not a de Polignac number, because 210012201999961 - 2³ = 210012201999953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210012201999899 and 210012201999908.

It is not a weakly prime, because it can be changed into another prime (210012201999461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105006100999980 + 105006100999981.

It is an arithmetic number, because the mean of its divisors is an integer number (105006100999981).

Almost surely, 2^{210012201999961} is an apocalyptic number.

It is an amenable number.

210012201999961 is a deficient number, since it is larger than the sum of its proper divisors (1).

210012201999961 is an equidigital number, since it uses as much as digits as its factorization.

210012201999961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 52.

The spelling of 210012201999961 in words is "two hundred ten trillion, twelve billion, two hundred one million, nine hundred ninety-nine thousand, nine hundred sixty-one".