221220100342 has 8 divisors (see below), whose sum is σ = 337269989232. Its totient is φ = 108796770600.

The previous prime is 221220100291. The next prime is 221220100373. The reversal of 221220100342 is 243001022122.

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

It is a congruent number.

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, 906639634 + ... + 906639877.

It is an arithmetic number, because the mean of its divisors is an integer number (42158748654).

Almost surely, 2^221220100342 is an apocalyptic number.

221220100342 is a deficient number, since it is larger than the sum of its proper divisors (116049888890).

221220100342 is a wasteful number, since it uses less digits than its factorization.

221220100342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813279574.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 221220100342 its reverse (243001022122), we get a palindrome (464221122464).

The spelling of 221220100342 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred thousand, three hundred forty-two".