2012211999961 has 2 divisors, whose sum is σ = 2012211999962. Its totient is φ = 2012211999960.

The previous prime is 2012211999953. The next prime is 2012211999997. The reversal of 2012211999961 is 1699991122102.

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., 1345611600025 + 666600399936 = 1160005^2 + 816456^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012211999961 - 2³ = 2012211999953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012211999899 and 2012211999908.

It is not a weakly prime, because it can be changed into another prime (2012211996961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006105999980 + 1006105999981.

It is an arithmetic number, because the mean of its divisors is an integer number (1006105999981).

Almost surely, 2^{2012211999961} is an apocalyptic number.

It is an amenable number.

2012211999961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012211999961 is an equidigital number, since it uses as much as digits as its factorization.

2012211999961 is an evil number, because the sum of its binary digits is even.

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

The spelling of 2012211999961 in words is "two trillion, twelve billion, two hundred eleven million, nine hundred ninety-nine thousand, nine hundred sixty-one".