2122030121 has 4 divisors (see below), whose sum is σ = 2122807044. Its totient is φ = 2121253200.

The previous prime is 2122030087. The next prime is 2122030129. The reversal of 2122030121 is 1210302212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 264420121 + 1857610000 = 16261^2 + 43100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122030121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2122030096 and 2122030105.

It is not an unprimeable number, because it can be changed into a prime (2122030129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384350 + ... + 389831.

It is an arithmetic number, because the mean of its divisors is an integer number (530701761).

Almost surely, 2^2122030121 is an apocalyptic number.

It is an amenable number.

2122030121 is a deficient number, since it is larger than the sum of its proper divisors (776923).

2122030121 is an equidigital number, since it uses as much as digits as its factorization.

2122030121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776922.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2122030121 is about 46065.4981629419. The cubic root of 2122030121 is about 1285.0415831345.

Adding to 2122030121 its reverse (1210302212), we get a palindrome (3332332333).

The spelling of 2122030121 in words is "two billion, one hundred twenty-two million, thirty thousand, one hundred twenty-one".