122145789638399 has 4 divisors (see below), whose sum is σ = 126085976400960. Its totient is φ = 118205602875840.

The previous prime is 122145789638371. The next prime is 122145789638429. The reversal of 122145789638399 is 993836987541221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122145789638399 - 2²⁰ = 122145788589823 is a prime.

It is a super-2 number, since 2×122145789638399² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122145789628399) 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, 1970093381234 + ... + 1970093381295.

It is an arithmetic number, because the mean of its divisors is an integer number (31521494100240).

Almost surely, 2^{122145789638399} is an apocalyptic number.

122145789638399 is a deficient number, since it is larger than the sum of its proper divisors (3940186762561).

122145789638399 is an equidigital number, since it uses as much as digits as its factorization.

122145789638399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940186762560.

The product of its digits is 1410877440, while the sum is 77.

The spelling of 122145789638399 in words is "one hundred twenty-two trillion, one hundred forty-five billion, seven hundred eighty-nine million, six hundred thirty-eight thousand, three hundred ninety-nine".