121422913 has 4 divisors (see below), whose sum is σ = 125609940. Its totient is φ = 117235888.

The previous prime is 121422887. The next prime is 121422923. The reversal of 121422913 is 319224121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 319224121 = 107 ⋅2983403.

It can be written as a sum of positive squares in 2 ways, for example, as 98267569 + 23155344 = 9913^2 + 4812^2 .

It is a cyclic number.

It is not a de Polignac number, because 121422913 - 2⁵ = 121422881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121422923) 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, 2093470 + ... + 2093527.

It is an arithmetic number, because the mean of its divisors is an integer number (31402485).

Almost surely, 2^121422913 is an apocalyptic number.

It is an amenable number.

121422913 is a deficient number, since it is larger than the sum of its proper divisors (4187027).

121422913 is an equidigital number, since it uses as much as digits as its factorization.

121422913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187026.

The product of its digits is 864, while the sum is 25.

The square root of 121422913 is about 11019.2065503828. The cubic root of 121422913 is about 495.1843179861.

The spelling of 121422913 in words is "one hundred twenty-one million, four hundred twenty-two thousand, nine hundred thirteen".