122115551 has 8 divisors (see below), whose sum is σ = 124598304. Its totient is φ = 119639520.

The previous prime is 122115529. The next prime is 122115559. The reversal of 122115551 is 155511221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122115551 - 2¹⁰ = 122114527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122115559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51686 + ... + 53996.

It is an arithmetic number, because the mean of its divisors is an integer number (15574788).

Almost surely, 2^122115551 is an apocalyptic number.

122115551 is a deficient number, since it is larger than the sum of its proper divisors (2482753).

122115551 is an equidigital number, since it uses as much as digits as its factorization.

122115551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3361.

The product of its digits is 500, while the sum is 23.

The square root of 122115551 is about 11050.5905272071. The cubic root of 122115551 is about 496.1241004400.

Adding to 122115551 its reverse (155511221), we get a palindrome (277626772).

The spelling of 122115551 in words is "one hundred twenty-two million, one hundred fifteen thousand, five hundred fifty-one".