23211421187 has 2 divisors, whose sum is σ = 23211421188. Its totient is φ = 23211421186.

The previous prime is 23211421153. The next prime is 23211421229. The reversal of 23211421187 is 78112411232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23211421187 - 2²⁰ = 23210372611 is a prime.

It is not a weakly prime, because it can be changed into another prime (23211421487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11605710593 + 11605710594.

It is an arithmetic number, because the mean of its divisors is an integer number (11605710594).

Almost surely, 2^23211421187 is an apocalyptic number.

23211421187 is a deficient number, since it is larger than the sum of its proper divisors (1).

23211421187 is an equidigital number, since it uses as much as digits as its factorization.

23211421187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 32.

The spelling of 23211421187 in words is "twenty-three billion, two hundred eleven million, four hundred twenty-one thousand, one hundred eighty-seven".