221121991342 has 16 divisors (see below), whose sum is σ = 381391834752. Its totient is φ = 94185176760.

The previous prime is 221121991309. The next prime is 221121991367. The reversal of 221121991342 is 243199121122.

It is a congruent number.

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, 48446884 + ... + 48451447.

It is an arithmetic number, because the mean of its divisors is an integer number (23836989672).

Almost surely, 2^221121991342 is an apocalyptic number.

221121991342 is a deficient number, since it is larger than the sum of its proper divisors (160269843410).

221121991342 is a wasteful number, since it uses less digits than its factorization.

221121991342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96898503.

The product of its digits is 15552, while the sum is 37.

The spelling of 221121991342 in words is "two hundred twenty-one billion, one hundred twenty-one million, nine hundred ninety-one thousand, three hundred forty-two".