402121043242 has 16 divisors (see below), whose sum is σ = 604443409920. Its totient is φ = 200639990512.

The previous prime is 402121043231. The next prime is 402121043251. The reversal of 402121043242 is 242340121204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15341484 + ... + 15367672.

It is an arithmetic number, because the mean of its divisors is an integer number (37777713120).

Almost surely, 2^402121043242 is an apocalyptic number.

402121043242 is a deficient number, since it is larger than the sum of its proper divisors (202322366678).

402121043242 is a wasteful number, since it uses less digits than its factorization.

402121043242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41957.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 402121043242 its reverse (242340121204), we get a palindrome (644461164446).

The spelling of 402121043242 in words is "four hundred two billion, one hundred twenty-one million, forty-three thousand, two hundred forty-two".