111012001222221 has 32 divisors (see below), whose sum is σ = 185200862269440. Its totient is φ = 65109678130800.

The previous prime is 111012001222163. The next prime is 111012001222223. The reversal of 111012001222221 is 122222100210111.

111012001222221 is a `hidden beast` number, since 11 + 10 + 1 + 200 + 1 + 222 + 221 = 666.

It is not a de Polignac number, because 111012001222221 - 2¹⁷ = 111012001091149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111012001222194 and 111012001222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012001222223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6028664695 + ... + 6028683108.

It is an arithmetic number, because the mean of its divisors is an integer number (5787526945920).

Almost surely, 2^{111012001222221} is an apocalyptic number.

111012001222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111012001222221 is a deficient number, since it is larger than the sum of its proper divisors (74188861047219).

111012001222221 is a wasteful number, since it uses less digits than its factorization.

111012001222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12057347854 (or 12057347848 counting only the distinct ones).

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

Adding to 111012001222221 its reverse (122222100210111), we get a palindrome (233234101432332).

The spelling of 111012001222221 in words is "one hundred eleven trillion, twelve billion, one million, two hundred twenty-two thousand, two hundred twenty-one".