402201122221 has 4 divisors (see below), whose sum is σ = 402219952992. Its totient is φ = 402182291452.

The previous prime is 402201122201. The next prime is 402201122249. The reversal of 402201122221 is 122221102204.

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 a de Polignac number, because none of the positive numbers 2^k-402201122221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402201122201) 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, 9383311 + ... + 9426076.

It is an arithmetic number, because the mean of its divisors is an integer number (100554988248).

Almost surely, 2^402201122221 is an apocalyptic number.

It is an amenable number.

402201122221 is a deficient number, since it is larger than the sum of its proper divisors (18830771).

402201122221 is a wasteful number, since it uses less digits than its factorization.

402201122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18830770.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 402201122221 its reverse (122221102204), we get a palindrome (524422224425).

The spelling of 402201122221 in words is "four hundred two billion, two hundred one million, one hundred twenty-two thousand, two hundred twenty-one".