122521552531 has 4 divisors (see below), whose sum is σ = 140024631472. Its totient is φ = 105018473592.

The previous prime is 122521552519. The next prime is 122521552547. The reversal of 122521552531 is 135255125221.

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 122521552531 - 2⁷ = 122521552403 is a prime.

It is a super-2 number, since 2×122521552531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122521552631) 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, 8751539460 + ... + 8751539473.

It is an arithmetic number, because the mean of its divisors is an integer number (35006157868).

Almost surely, 2^122521552531 is an apocalyptic number.

122521552531 is a deficient number, since it is larger than the sum of its proper divisors (17503078941).

122521552531 is an equidigital number, since it uses as much as digits as its factorization.

122521552531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17503078940.

The product of its digits is 30000, while the sum is 34.

Adding to 122521552531 its reverse (135255125221), we get a palindrome (257776677752).

The spelling of 122521552531 in words is "one hundred twenty-two billion, five hundred twenty-one million, five hundred fifty-two thousand, five hundred thirty-one".