203211222121 has 8 divisors (see below), whose sum is σ = 212051211840. Its totient is φ = 194371625712.

The previous prime is 203211222107. The next prime is 203211222127. The reversal of 203211222121 is 121222112302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203211222121 - 2⁵ = 203211222089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203211222127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1534770 + ... + 1661908.

It is an arithmetic number, because the mean of its divisors is an integer number (26506401480).

Almost surely, 2^203211222121 is an apocalyptic number.

It is an amenable number.

203211222121 is a deficient number, since it is larger than the sum of its proper divisors (8839989719).

203211222121 is a wasteful number, since it uses less digits than its factorization.

203211222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196655.

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

Adding to 203211222121 its reverse (121222112302), we get a palindrome (324433334423).

The spelling of 203211222121 in words is "two hundred three billion, two hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".