111010120001221 has 16 divisors (see below), whose sum is σ = 127351616249088. Its totient is φ = 94789605312000.

The previous prime is 111010120001201. The next prime is 111010120001267. The reversal of 111010120001221 is 122100021010111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111010120001221 - 2⁷ = 111010120001093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111010120001201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5376460 + ... + 15840661.

It is an arithmetic number, because the mean of its divisors is an integer number (7959476015568).

Almost surely, 2^{111010120001221} is an apocalyptic number.

It is an amenable number.

111010120001221 is a deficient number, since it is larger than the sum of its proper divisors (16341496247867).

111010120001221 is a wasteful number, since it uses less digits than its factorization.

111010120001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21219972.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111010120001221 its reverse (122100021010111), we get a palindrome (233110141011332).

The spelling of 111010120001221 in words is "one hundred eleven trillion, ten billion, one hundred twenty million, one thousand, two hundred twenty-one".