221021221112102 has 32 divisors (see below), whose sum is σ = 336416057671680. Its totient is φ = 108894228616800.

The previous prime is 221021221111997. The next prime is 221021221112119. The reversal of 221021221112102 is 201211122120122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33042299 + ... + 39164217.

It is an arithmetic number, because the mean of its divisors is an integer number (10513001802240).

Almost surely, 2^{221021221112102} is an apocalyptic number.

221021221112102 is a deficient number, since it is larger than the sum of its proper divisors (115394836559578).

221021221112102 is a wasteful number, since it uses less digits than its factorization.

221021221112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122876.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221021221112102 its reverse (201211122120122), we get a palindrome (422232343232224).

The spelling of 221021221112102 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, one hundred two".