20201120977 has 2 divisors, whose sum is σ = 20201120978. Its totient is φ = 20201120976.

The previous prime is 20201120971. The next prime is 20201120983. The reversal of 20201120977 is 77902110202.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20201120971) and next prime (20201120983).

It can be written as a sum of positive squares in only one way, i.e., 20198378641 + 2742336 = 142121^2 + 1656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201120977 is a prime.

It is not a weakly prime, because it can be changed into another prime (20201120971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100560488 + 10100560489.

It is an arithmetic number, because the mean of its divisors is an integer number (10100560489).

Almost surely, 2^20201120977 is an apocalyptic number.

It is an amenable number.

20201120977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201120977 is an equidigital number, since it uses as much as digits as its factorization.

20201120977 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 20201120977 in words is "twenty billion, two hundred one million, one hundred twenty thousand, nine hundred seventy-seven".