402244132221 has 48 divisors (see below), whose sum is σ = 619812805248. Its totient is φ = 260497944000.

The previous prime is 402244132201. The next prime is 402244132247. The reversal of 402244132221 is 122231442204.

It is a happy number.

402244132221 is a `hidden beast` number, since 4 + 0 + 2 + 24 + 413 + 2 + 221 = 666.

It is not a de Polignac number, because 402244132221 - 2⁷ = 402244132093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402244132201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5637871 + ... + 5708771.

It is an arithmetic number, because the mean of its divisors is an integer number (12912766776).

Almost surely, 2^402244132221 is an apocalyptic number.

It is an amenable number.

402244132221 is a deficient number, since it is larger than the sum of its proper divisors (217568673027).

402244132221 is an equidigital number, since it uses as much as digits as its factorization.

402244132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71584 (or 71572 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 402244132221 its reverse (122231442204), we get a palindrome (524475574425).

The spelling of 402244132221 in words is "four hundred two billion, two hundred forty-four million, one hundred thirty-two thousand, two hundred twenty-one".