201220120221 has 16 divisors (see below), whose sum is σ = 269312395968. Its totient is φ = 133638243200.

The previous prime is 201220120207. The next prime is 201220120261. The reversal of 201220120221 is 122021022102.

It is a cyclic number.

It is not a de Polignac number, because 201220120221 - 2¹¹ = 201220118173 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201220120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220120261) 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, 735406 + ... + 971216.

It is an arithmetic number, because the mean of its divisors is an integer number (16832024748).

Almost surely, 2^201220120221 is an apocalyptic number.

It is an amenable number.

201220120221 is a deficient number, since it is larger than the sum of its proper divisors (68092275747).

201220120221 is a wasteful number, since it uses less digits than its factorization.

201220120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236892.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201220120221 its reverse (122021022102), we get a palindrome (323241142323).

The spelling of 201220120221 in words is "two hundred one billion, two hundred twenty million, one hundred twenty thousand, two hundred twenty-one".