221201112121102 has 16 divisors (see below), whose sum is σ = 342505668096000. Its totient is φ = 107032571095320.

The previous prime is 221201112121063. The next prime is 221201112121109. The reversal of 221201112121102 is 201121211102122.

It is a happy number.

It is a super-2 number, since 2×221201112121102² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221201112121102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201112121109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28135899 + ... + 35128777.

It is an arithmetic number, because the mean of its divisors is an integer number (21406604256000).

Almost surely, 2^{221201112121102} is an apocalyptic number.

221201112121102 is a deficient number, since it is larger than the sum of its proper divisors (121304555974898).

221201112121102 is a wasteful number, since it uses less digits than its factorization.

221201112121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7503111.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221201112121102 its reverse (201121211102122), we get a palindrome (422322323223224).

The spelling of 221201112121102 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred two".