2120111100977 has 2 divisors, whose sum is σ = 2120111100978. Its totient is φ = 2120111100976.

The previous prime is 2120111100967. The next prime is 2120111101021. The reversal of 2120111100977 is 7790011110212.

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., 1662859251361 + 457251849616 = 1289519^2 + 676204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120111100977 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120111100967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060055550488 + 1060055550489.

It is an arithmetic number, because the mean of its divisors is an integer number (1060055550489).

Almost surely, 2^{2120111100977} is an apocalyptic number.

It is an amenable number.

2120111100977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120111100977 is an equidigital number, since it uses as much as digits as its factorization.

2120111100977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 32.

The spelling of 2120111100977 in words is "two trillion, one hundred twenty billion, one hundred eleven million, one hundred thousand, nine hundred seventy-seven".