221211002120201 has 16 divisors (see below), whose sum is σ = 230119633920000. Its totient is φ = 212413591587600.

The previous prime is 221211002120183. The next prime is 221211002120279. The reversal of 221211002120201 is 102021200112122.

It is a cyclic number.

It is not a de Polignac number, because 221211002120201 - 2³⁸ = 220936124213257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221211002120201.

It is not an unprimeable number, because it can be changed into a prime (221211002170201) 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, 27999050 + ... + 35019548.

It is an arithmetic number, because the mean of its divisors is an integer number (14382477120000).

Almost surely, 2^{221211002120201} is an apocalyptic number.

It is an amenable number.

221211002120201 is a deficient number, since it is larger than the sum of its proper divisors (8908631799799).

221211002120201 is a wasteful number, since it uses less digits than its factorization.

221211002120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7028420.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221211002120201 its reverse (102021200112122), we get a palindrome (323232202232323).

The spelling of 221211002120201 in words is "two hundred twenty-one trillion, two hundred eleven billion, two million, one hundred twenty thousand, two hundred one".