221121012923 has 2 divisors, whose sum is σ = 221121012924. Its totient is φ = 221121012922.

The previous prime is 221121012913. The next prime is 221121012929. The reversal of 221121012923 is 329210121122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221121012923 - 2²⁴ = 221104235707 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 221121012892 and 221121012901.

It is not a weakly prime, because it can be changed into another prime (221121012929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560506461 + 110560506462.

It is an arithmetic number, because the mean of its divisors is an integer number (110560506462).

Almost surely, 2^221121012923 is an apocalyptic number.

221121012923 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121012923 is an equidigital number, since it uses as much as digits as its factorization.

221121012923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 221121012923 in words is "two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, nine hundred twenty-three".