1111222100121 has 32 divisors (see below), whose sum is σ = 1739225207808. Its totient is φ = 617762013120.

The previous prime is 1111222100089. The next prime is 1111222100141. The reversal of 1111222100121 is 1210012221111.

It is a happy number.

It is not a de Polignac number, because 1111222100121 - 2⁵ = 1111222100089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111222100121.

It is not an unprimeable number, because it can be changed into a prime (1111222100141) 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, 8584546 + ... + 8713028.

It is an arithmetic number, because the mean of its divisors is an integer number (54350787744).

Almost surely, 2^{1111222100121} is an apocalyptic number.

It is an amenable number.

1111222100121 is a deficient number, since it is larger than the sum of its proper divisors (628003107687).

1111222100121 is a wasteful number, since it uses less digits than its factorization.

1111222100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139661.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111222100121 its reverse (1210012221111), we get a palindrome (2321234321232).

The spelling of 1111222100121 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, one hundred thousand, one hundred twenty-one".