122113021 has 4 divisors (see below), whose sum is σ = 122159772. Its totient is φ = 122066272.

The previous prime is 122112979. The next prime is 122113087. The reversal of 122113021 is 120311221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120311221 = 199 ⋅604579.

It can be written as a sum of positive squares in 2 ways, for example, as 37380996 + 84732025 = 6114^2 + 9205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122113021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122112992 and 122113010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122113721) 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, 19210 + ... + 24763.

It is an arithmetic number, because the mean of its divisors is an integer number (30539943).

Almost surely, 2^122113021 is an apocalyptic number.

It is an amenable number.

122113021 is a deficient number, since it is larger than the sum of its proper divisors (46751).

122113021 is an equidigital number, since it uses as much as digits as its factorization.

122113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46750.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 122113021 is about 11050.4760530938. The cubic root of 122113021 is about 496.1206741697.

Adding to 122113021 its reverse (120311221), we get a palindrome (242424242).

The spelling of 122113021 in words is "one hundred twenty-two million, one hundred thirteen thousand, twenty-one".