402221331420 has 48 divisors (see below), whose sum is σ = 1137370435488. Its totient is φ = 106197049600.

The previous prime is 402221331419. The next prime is 402221331437. The reversal of 402221331420 is 24133122204.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33180519 + ... + 33192638.

It is an arithmetic number, because the mean of its divisors is an integer number (23695217406).

Almost surely, 2^402221331420 is an apocalyptic number.

It is an amenable number.

402221331420 is an abundant number, since it is smaller than the sum of its proper divisors (735149104068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402221331420 is a wasteful number, since it uses less digits than its factorization.

402221331420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66373270 (or 66373268 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 402221331420 its reverse (24133122204), we get a palindrome (426354453624).

The spelling of 402221331420 in words is "four hundred two billion, two hundred twenty-one million, three hundred thirty-one thousand, four hundred twenty".