221021120102 has 8 divisors (see below), whose sum is σ = 331585861512. Its totient is φ = 110492499600.

The previous prime is 221021120093. The next prime is 221021120147. The reversal of 221021120102 is 201021120122.

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

It is a super-2 number, since 2×221021120102² (a number of 23 digits) contains 22 as substring.

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, 9014924 + ... + 9039407.

It is an arithmetic number, because the mean of its divisors is an integer number (41448232689).

Almost surely, 2^221021120102 is an apocalyptic number.

221021120102 is a deficient number, since it is larger than the sum of its proper divisors (110564741410).

221021120102 is a wasteful number, since it uses less digits than its factorization.

221021120102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18060454.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221021120102 its reverse (201021120122), we get a palindrome (422042240224).

The spelling of 221021120102 in words is "two hundred twenty-one billion, twenty-one million, one hundred twenty thousand, one hundred two".