111221002202121 has 12 divisors (see below), whose sum is σ = 183602924270272. Its totient is φ = 63554858401176.

The previous prime is 111221002202117. The next prime is 111221002202129. The reversal of 111221002202121 is 121202200122111.

111221002202121 is a `hidden beast` number, since 1 + 11 + 221 + 0 + 0 + 220 + 212 + 1 = 666.

It is not a de Polignac number, because 111221002202121 - 2² = 111221002202117 is a prime.

It is a super-2 number, since 2×111221002202121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221002202094 and 111221002202103.

It is not an unprimeable number, because it can be changed into a prime (111221002202129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 882706366621 + ... + 882706366746.

Almost surely, 2^{111221002202121} is an apocalyptic number.

It is an amenable number.

111221002202121 is a deficient number, since it is larger than the sum of its proper divisors (72381922068151).

111221002202121 is a wasteful number, since it uses less digits than its factorization.

111221002202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765412733380 (or 1765412733377 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111221002202121 its reverse (121202200122111), we get a palindrome (232423202324232).

The spelling of 111221002202121 in words is "one hundred eleven trillion, two hundred twenty-one billion, two million, two hundred two thousand, one hundred twenty-one".