20212001077 has 2 divisors, whose sum is σ = 20212001078. Its totient is φ = 20212001076.

The previous prime is 20212001057. The next prime is 20212001093. The reversal of 20212001077 is 77010021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18546626596 + 1665374481 = 136186^2 + 40809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212001077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212001057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106000538 + 10106000539.

It is an arithmetic number, because the mean of its divisors is an integer number (10106000539).

Almost surely, 2^20212001077 is an apocalyptic number.

It is an amenable number.

20212001077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212001077 is an equidigital number, since it uses as much as digits as its factorization.

20212001077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 22.

Adding to 20212001077 its reverse (77010021202), we get a palindrome (97222022279).

The spelling of 20212001077 in words is "twenty billion, two hundred twelve million, one thousand, seventy-seven".