122122001021 has 4 divisors (see below), whose sum is σ = 122341251132. Its totient is φ = 121902750912.

The previous prime is 122122000961. The next prime is 122122001039. The reversal of 122122001021 is 120100221221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120100221221 = 197 ⋅609645793.

It can be written as a sum of positive squares in 2 ways, for example, as 78770596921 + 43351404100 = 280661^2 + 208210^2 .

It is a cyclic number.

It is not a de Polignac number, because 122122001021 - 2³⁰ = 121048259197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122122000987 and 122122001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122001621) 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, 109624220 + ... + 109625333.

It is an arithmetic number, because the mean of its divisors is an integer number (30585312783).

Almost surely, 2^122122001021 is an apocalyptic number.

It is an amenable number.

122122001021 is a deficient number, since it is larger than the sum of its proper divisors (219250111).

122122001021 is an equidigital number, since it uses as much as digits as its factorization.

122122001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219250110.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 122122001021 its reverse (120100221221), we get a palindrome (242222222242).

The spelling of 122122001021 in words is "one hundred twenty-two billion, one hundred twenty-two million, one thousand, twenty-one".