210201220121 has 16 divisors (see below), whose sum is σ = 214952123520. Its totient is φ = 205480429440.

The previous prime is 210201220111. The next prime is 210201220127. The reversal of 210201220121 is 121022102012.

It is a cyclic number.

It is not a de Polignac number, because 210201220121 - 2²² = 210197025817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210201220096 and 210201220105.

It is not an unprimeable number, because it can be changed into a prime (210201220127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25130486 + ... + 25138848.

It is an arithmetic number, because the mean of its divisors is an integer number (13434507720).

Almost surely, 2^210201220121 is an apocalyptic number.

It is an amenable number.

210201220121 is a deficient number, since it is larger than the sum of its proper divisors (4750903399).

210201220121 is a wasteful number, since it uses less digits than its factorization.

210201220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10096.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210201220121 its reverse (121022102012), we get a palindrome (331223322133).

The spelling of 210201220121 in words is "two hundred ten billion, two hundred one million, two hundred twenty thousand, one hundred twenty-one".