2247678271921 has 2 divisors, whose sum is σ = 2247678271922. Its totient is φ = 2247678271920.

The previous prime is 2247678271897. The next prime is 2247678271931. The reversal of 2247678271921 is 1291728767422.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2176141280625 + 71536991296 = 1475175^2 + 267464^2 .

It is a cyclic number.

It is not a de Polignac number, because 2247678271921 - 2⁵ = 2247678271889 is a prime.

It is a super-2 number, since 2×2247678271921² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2247678271931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1123839135960 + 1123839135961.

It is an arithmetic number, because the mean of its divisors is an integer number (1123839135961).

Almost surely, 2^{2247678271921} is an apocalyptic number.

It is an amenable number.

2247678271921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2247678271921 is an equidigital number, since it uses as much as digits as its factorization.

2247678271921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9483264, while the sum is 58.

The spelling of 2247678271921 in words is "two trillion, two hundred forty-seven billion, six hundred seventy-eight million, two hundred seventy-one thousand, nine hundred twenty-one".