122102021 has 4 divisors (see below), whose sum is σ = 122494944. Its totient is φ = 121709100.

The previous prime is 122102017. The next prime is 122102023. The reversal of 122102021 is 120201221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120201221 = 7 ⋅17171603.

It is a cyclic number.

It is not a de Polignac number, because 122102021 - 2² = 122102017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122101993 and 122102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122102023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195995 + ... + 196616.

It is an arithmetic number, because the mean of its divisors is an integer number (30623736).

Almost surely, 2^122102021 is an apocalyptic number.

It is an amenable number.

122102021 is a deficient number, since it is larger than the sum of its proper divisors (392923).

122102021 is an equidigital number, since it uses as much as digits as its factorization.

122102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392922.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 122102021 is about 11049.9783257706. The cubic root of 122102021 is about 496.1057767923.

Adding to 122102021 its reverse (120201221), we get a palindrome (242303242).

The spelling of 122102021 in words is "one hundred twenty-two million, one hundred two thousand, twenty-one".