122155501 has 4 divisors (see below), whose sum is σ = 131552092. Its totient is φ = 112758912.

The previous prime is 122155487. The next prime is 122155519. The reversal of 122155501 is 105551221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105551221 = 197 ⋅535793.

It can be written as a sum of positive squares in 2 ways, for example, as 7986276 + 114169225 = 2826^2 + 10685^2 .

It is a cyclic number.

It is not a de Polignac number, because 122155501 - 2¹³ = 122147309 is a prime.

It is a super-2 number, since 2×122155501² = 29843932849122002, which 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 (122158501) 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, 4698276 + ... + 4698301.

It is an arithmetic number, because the mean of its divisors is an integer number (32888023).

Almost surely, 2^122155501 is an apocalyptic number.

It is an amenable number.

122155501 is a deficient number, since it is larger than the sum of its proper divisors (9396591).

122155501 is an equidigital number, since it uses as much as digits as its factorization.

122155501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9396590.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 122155501 is about 11052.3979751002. The cubic root of 122155501 is about 496.1781967355.

The spelling of 122155501 in words is "one hundred twenty-two million, one hundred fifty-five thousand, five hundred one".