2203212120121 has 4 divisors (see below), whose sum is σ = 2203215999732. Its totient is φ = 2203208240512.

The previous prime is 2203212120089. The next prime is 2203212120209. The reversal of 2203212120121 is 1210212123022.

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 296437780521 + 1906774339600 = 544461^2 + 1380860^2 .

It is a cyclic number.

It is not a de Polignac number, because 2203212120121 - 2⁵ = 2203212120089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2203212127121) 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, 903376 + ... + 2285281.

It is an arithmetic number, because the mean of its divisors is an integer number (550803999933).

Almost surely, 2^{2203212120121} is an apocalyptic number.

It is an amenable number.

2203212120121 is a deficient number, since it is larger than the sum of its proper divisors (3879611).

2203212120121 is an equidigital number, since it uses as much as digits as its factorization.

2203212120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3879610.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2203212120121 its reverse (1210212123022), we get a palindrome (3413424243143).

The spelling of 2203212120121 in words is "two trillion, two hundred three billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-one".