122501973887 has 4 divisors (see below), whose sum is σ = 126453650496. Its totient is φ = 118550297280.

The previous prime is 122501973877. The next prime is 122501973929. The reversal of 122501973887 is 788379105221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788379105221 = 53 ⋅14875077457.

It is a cyclic number.

It is not a de Polignac number, because 122501973887 - 2¹⁸ = 122501711743 is a prime.

It is a super-2 number, since 2×122501973887² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122501973857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1975838258 + ... + 1975838319.

It is an arithmetic number, because the mean of its divisors is an integer number (31613412624).

Almost surely, 2^122501973887 is an apocalyptic number.

122501973887 is a deficient number, since it is larger than the sum of its proper divisors (3951676609).

122501973887 is an equidigital number, since it uses as much as digits as its factorization.

122501973887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951676608.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The spelling of 122501973887 in words is "one hundred twenty-two billion, five hundred one million, nine hundred seventy-three thousand, eight hundred eighty-seven".