2100202040077 has 2 divisors, whose sum is σ = 2100202040078. Its totient is φ = 2100202040076.

The previous prime is 2100202040021. The next prime is 2100202040093. The reversal of 2100202040077 is 7700402020012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2090600783881 + 9601256196 = 1445891^2 + 97986^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100202040077 - 2²³ = 2100193651469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100202040477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050101020038 + 1050101020039.

It is an arithmetic number, because the mean of its divisors is an integer number (1050101020039).

Almost surely, 2^{2100202040077} is an apocalyptic number.

It is an amenable number.

2100202040077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100202040077 is an equidigital number, since it uses as much as digits as its factorization.

2100202040077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 25.

Adding to 2100202040077 its reverse (7700402020012), we get a palindrome (9800604060089).

The spelling of 2100202040077 in words is "two trillion, one hundred billion, two hundred two million, forty thousand, seventy-seven".