122011905 has 8 divisors (see below), whose sum is σ = 195219072. Its totient is φ = 65073008.

The previous prime is 122011889. The next prime is 122011913. The reversal of 122011905 is 509110221.

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 122011905 - 2⁴ = 122011889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4067049 + ... + 4067078.

It is an arithmetic number, because the mean of its divisors is an integer number (24402384).

Almost surely, 2^122011905 is an apocalyptic number.

122011905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122011905 is a deficient number, since it is larger than the sum of its proper divisors (73207167).

122011905 is an equidigital number, since it uses as much as digits as its factorization.

122011905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8134135.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 122011905 is about 11045.8999180691. The cubic root of 122011905 is about 495.9836983564.

The spelling of 122011905 in words is "one hundred twenty-two million, eleven thousand, nine hundred five".