221312040042 has 8 divisors (see below), whose sum is σ = 442624080096. Its totient is φ = 73770680012.

The previous prime is 221312039987. The next prime is 221312040097. The reversal of 221312040042 is 240040213122.

It is an interprime number because it is at equal distance from previous prime (221312039987) and next prime (221312040097).

It is a sphenic number, since it is the product of 3 distinct primes.

221312040042 is an admirable number.

It is a super-2 number, since 2×221312040042² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18442669998 + ... + 18442670009.

It is an arithmetic number, because the mean of its divisors is an integer number (55328010012).

Almost surely, 2^221312040042 is an apocalyptic number.

221312040042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221312040042 is a wasteful number, since it uses less digits than its factorization.

221312040042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36885340012.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 221312040042 its reverse (240040213122), we get a palindrome (461352253164).

The spelling of 221312040042 in words is "two hundred twenty-one billion, three hundred twelve million, forty thousand, forty-two".