2157220797019 has 2 divisors, whose sum is σ = 2157220797020. Its totient is φ = 2157220797018.

The previous prime is 2157220797013. The next prime is 2157220797023. The reversal of 2157220797019 is 9107970227512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157220797019 is a prime.

It is a super-2 number, since 2×2157220797019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2157220797013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078610398509 + 1078610398510.

It is an arithmetic number, because the mean of its divisors is an integer number (1078610398510).

Almost surely, 2^{2157220797019} is an apocalyptic number.

2157220797019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157220797019 is an equidigital number, since it uses as much as digits as its factorization.

2157220797019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The spelling of 2157220797019 in words is "two trillion, one hundred fifty-seven billion, two hundred twenty million, seven hundred ninety-seven thousand, nineteen".