203211201121 has 4 divisors (see below), whose sum is σ = 203217955072. Its totient is φ = 203204447172.

The previous prime is 203211201107. The next prime is 203211201157. The reversal of 203211201121 is 121102112302.

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.

It is a cyclic number.

It is not a de Polignac number, because 203211201121 - 2¹⁵ = 203211168353 is a prime.

It is a super-2 number, since 2×203211201121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203211201095 and 203211201104.

It is not an unprimeable number, because it can be changed into a prime (203211201101) 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, 3331641 + ... + 3392086.

It is an arithmetic number, because the mean of its divisors is an integer number (50804488768).

Almost surely, 2^203211201121 is an apocalyptic number.

It is an amenable number.

203211201121 is a deficient number, since it is larger than the sum of its proper divisors (6753951).

203211201121 is an equidigital number, since it uses as much as digits as its factorization.

203211201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6753950.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 203211201121 its reverse (121102112302), we get a palindrome (324313313423).

The spelling of 203211201121 in words is "two hundred three billion, two hundred eleven million, two hundred one thousand, one hundred twenty-one".