122290597987 has 4 divisors (see below), whose sum is σ = 123838580320. Its totient is φ = 120742615656.

The previous prime is 122290597973. The next prime is 122290597991. The reversal of 122290597987 is 789795092221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789795092221 = 401 ⋅1969563821.

It is a cyclic number.

It is not a de Polignac number, because 122290597987 - 2³¹ = 120143114339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122290597087) 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, 773991048 + ... + 773991205.

It is an arithmetic number, because the mean of its divisors is an integer number (30959645080).

Almost surely, 2^122290597987 is an apocalyptic number.

122290597987 is a deficient number, since it is larger than the sum of its proper divisors (1547982333).

122290597987 is an equidigital number, since it uses as much as digits as its factorization.

122290597987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547982332.

The product of its (nonzero) digits is 11430720, while the sum is 61.

The spelling of 122290597987 in words is "one hundred twenty-two billion, two hundred ninety million, five hundred ninety-seven thousand, nine hundred eighty-seven".