22121352751987 has 2 divisors, whose sum is σ = 22121352751988. Its totient is φ = 22121352751986.

The previous prime is 22121352751907. The next prime is 22121352752117. The reversal of 22121352751987 is 78915725312122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22121352751987 - 2³⁵ = 22086993013619 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121352751907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060676375993 + 11060676375994.

It is an arithmetic number, because the mean of its divisors is an integer number (11060676375994).

Almost surely, 2^{22121352751987} is an apocalyptic number.

22121352751987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121352751987 is an equidigital number, since it uses as much as digits as its factorization.

22121352751987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 55.

The spelling of 22121352751987 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred fifty-two million, seven hundred fifty-one thousand, nine hundred eighty-seven".