402442200221 has 12 divisors (see below), whose sum is σ = 417560493792. Its totient is φ = 387854083344.

The previous prime is 402442200211. The next prime is 402442200301. The reversal of 402442200221 is 122002244204.

It is not a de Polignac number, because 402442200221 - 2⁶ = 402442200157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402442200211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22616 + ... + 897438.

It is an arithmetic number, because the mean of its divisors is an integer number (34796707816).

Almost surely, 2^402442200221 is an apocalyptic number.

It is an amenable number.

402442200221 is a deficient number, since it is larger than the sum of its proper divisors (15118293571).

402442200221 is an equidigital number, since it uses as much as digits as its factorization.

402442200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875428 (or 875399 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 402442200221 its reverse (122002244204), we get a palindrome (524444444425).

The spelling of 402442200221 in words is "four hundred two billion, four hundred forty-two million, two hundred thousand, two hundred twenty-one".