22123122311987 has 2 divisors, whose sum is σ = 22123122311988. Its totient is φ = 22123122311986.

The previous prime is 22123122311923. The next prime is 22123122312007. The reversal of 22123122311987 is 78911322132122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22123122311987 - 2⁶ = 22123122311923 is a prime.

It is a super-2 number, since 2×22123122311987² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22123122313987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061561155993 + 11061561155994.

It is an arithmetic number, because the mean of its divisors is an integer number (11061561155994).

Almost surely, 2^{22123122311987} is an apocalyptic number.

22123122311987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22123122311987 is an equidigital number, since it uses as much as digits as its factorization.

22123122311987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The spelling of 22123122311987 in words is "twenty-two trillion, one hundred twenty-three billion, one hundred twenty-two million, three hundred eleven thousand, nine hundred eighty-seven".