122020200121 has 4 divisors (see below), whose sum is σ = 122058227700. Its totient is φ = 121982172544.

The previous prime is 122020200101. The next prime is 122020200157. The reversal of 122020200121 is 121002020221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121002020221 = 6763 ⋅17891767.

It can be written as a sum of positive squares in 2 ways, for example, as 39179847721 + 82840352400 = 197939^2 + 287820^2 .

It is a cyclic number.

It is not a de Polignac number, because 122020200121 - 2³¹ = 119872716473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122020200101) 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, 19008976 + ... + 19015393.

It is an arithmetic number, because the mean of its divisors is an integer number (30514556925).

Almost surely, 2^122020200121 is an apocalyptic number.

It is an amenable number.

122020200121 is a deficient number, since it is larger than the sum of its proper divisors (38027579).

122020200121 is an equidigital number, since it uses as much as digits as its factorization.

122020200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38027578.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 122020200121 its reverse (121002020221), we get a palindrome (243022220342).

The spelling of 122020200121 in words is "one hundred twenty-two billion, twenty million, two hundred thousand, one hundred twenty-one".