2021137280377 has 2 divisors, whose sum is σ = 2021137280378. Its totient is φ = 2021137280376.

The previous prime is 2021137280317. The next prime is 2021137280401. The reversal of 2021137280377 is 7730827311202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1600657659241 + 420479621136 = 1265171^2 + 648444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021137280377 is a prime.

It is a super-2 number, since 2×2021137280377² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2021137280317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010568640188 + 1010568640189.

It is an arithmetic number, because the mean of its divisors is an integer number (1010568640189).

Almost surely, 2^{2021137280377} is an apocalyptic number.

It is an amenable number.

2021137280377 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021137280377 is an equidigital number, since it uses as much as digits as its factorization.

2021137280377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 43.

The spelling of 2021137280377 in words is "two trillion, twenty-one billion, one hundred thirty-seven million, two hundred eighty thousand, three hundred seventy-seven".