111121000020121 has 16 divisors (see below), whose sum is σ = 136923892769664. Its totient is φ = 87817321713024.

The previous prime is 111121000019957. The next prime is 111121000020169. The reversal of 111121000020121 is 121020000121111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111121000020121 - 2²⁹ = 111120463149209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (111121000024121) 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, 712354855 + ... + 712510828.

It is an arithmetic number, because the mean of its divisors is an integer number (8557743298104).

Almost surely, 2^{111121000020121} is an apocalyptic number.

It is an amenable number.

111121000020121 is a deficient number, since it is larger than the sum of its proper divisors (25802892749543).

111121000020121 is a wasteful number, since it uses less digits than its factorization.

111121000020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424866560.

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

Adding to 111121000020121 its reverse (121020000121111), we get a palindrome (232141000141232).

The spelling of 111121000020121 in words is "one hundred eleven trillion, one hundred twenty-one billion, twenty thousand, one hundred twenty-one".