20102001020977 has 2 divisors, whose sum is σ = 20102001020978. Its totient is φ = 20102001020976.

The previous prime is 20102001020957. The next prime is 20102001021007. The reversal of 20102001020977 is 77902010020102.

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., 19411699268641 + 690301752336 = 4405871^2 + 830844^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102001020977 - 2³¹ = 20099853537329 is a prime.

It is not a weakly prime, because it can be changed into another prime (20102001020957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051000510488 + 10051000510489.

It is an arithmetic number, because the mean of its divisors is an integer number (10051000510489).

Almost surely, 2^{20102001020977} is an apocalyptic number.

It is an amenable number.

20102001020977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102001020977 is an equidigital number, since it uses as much as digits as its factorization.

20102001020977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 20102001020977 in words is "twenty trillion, one hundred two billion, one million, twenty thousand, nine hundred seventy-seven".