122130405515 has 4 divisors (see below), whose sum is σ = 146556486624. Its totient is φ = 97704324408.

The previous prime is 122130405511. The next prime is 122130405521. The reversal of 122130405515 is 515504031221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515504031221 = 103 ⋅5004893507.

It is a cyclic number.

It is not a de Polignac number, because 122130405515 - 2² = 122130405511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122130405511) 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, 12213040547 + ... + 12213040556.

It is an arithmetic number, because the mean of its divisors is an integer number (36639121656).

Almost surely, 2^122130405515 is an apocalyptic number.

122130405515 is a deficient number, since it is larger than the sum of its proper divisors (24426081109).

122130405515 is an equidigital number, since it uses as much as digits as its factorization.

122130405515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24426081108.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 122130405515 its reverse (515504031221), we get a palindrome (637634436736).

The spelling of 122130405515 in words is "one hundred twenty-two billion, one hundred thirty million, four hundred five thousand, five hundred fifteen".