1921144653227 has 2 divisors, whose sum is σ = 1921144653228. Its totient is φ = 1921144653226.

The previous prime is 1921144653173. The next prime is 1921144653247. The reversal of 1921144653227 is 7223564411291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1921144653227 - 2⁸ = 1921144652971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1921144653247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960572326613 + 960572326614.

It is an arithmetic number, because the mean of its divisors is an integer number (960572326614).

Almost surely, 2^{1921144653227} is an apocalyptic number.

1921144653227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921144653227 is an equidigital number, since it uses as much as digits as its factorization.

1921144653227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The spelling of 1921144653227 in words is "one trillion, nine hundred twenty-one billion, one hundred forty-four million, six hundred fifty-three thousand, two hundred twenty-seven".