2111002099961 has 2 divisors, whose sum is σ = 2111002099962. Its totient is φ = 2111002099960.

The previous prime is 2111002099949. The next prime is 2111002100071. The reversal of 2111002099961 is 1699902001112.

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., 1576202409961 + 534799690000 = 1255469^2 + 731300^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111002099961 - 2¹⁸ = 2111001837817 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111002099061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055501049980 + 1055501049981.

It is an arithmetic number, because the mean of its divisors is an integer number (1055501049981).

Almost surely, 2^{2111002099961} is an apocalyptic number.

It is an amenable number.

2111002099961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111002099961 is an equidigital number, since it uses as much as digits as its factorization.

2111002099961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 41.

The spelling of 2111002099961 in words is "two trillion, one hundred eleven billion, two million, ninety-nine thousand, nine hundred sixty-one".