221542321102 has 8 divisors (see below), whose sum is σ = 332318080512. Its totient is φ = 110769627600.

The previous prime is 221542321079. The next prime is 221542321103. The reversal of 221542321102 is 201123245122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221542321103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576399 + ... + 880522.

It is an arithmetic number, because the mean of its divisors is an integer number (41539760064).

Almost surely, 2^221542321102 is an apocalyptic number.

221542321102 is a deficient number, since it is larger than the sum of its proper divisors (110775759410).

221542321102 is a wasteful number, since it uses less digits than its factorization.

221542321102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532954.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 221542321102 its reverse (201123245122), we get a palindrome (422665566224).

The spelling of 221542321102 in words is "two hundred twenty-one billion, five hundred forty-two million, three hundred twenty-one thousand, one hundred two".