111012020100121 has 4 divisors (see below), whose sum is σ = 126870880114432. Its totient is φ = 95153160085812.

The previous prime is 111012020100101. The next prime is 111012020100131. The reversal of 111012020100121 is 121001020210111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111012020100121 - 2¹⁵ = 111012020067353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111012020100101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7929430007145 + ... + 7929430007158.

It is an arithmetic number, because the mean of its divisors is an integer number (31717720028608).

Almost surely, 2^{111012020100121} is an apocalyptic number.

It is an amenable number.

111012020100121 is a deficient number, since it is larger than the sum of its proper divisors (15858860014311).

111012020100121 is an equidigital number, since it uses as much as digits as its factorization.

111012020100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15858860014310.

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

Adding to 111012020100121 its reverse (121001020210111), we get a palindrome (232013040310232).

The spelling of 111012020100121 in words is "one hundred eleven trillion, twelve billion, twenty million, one hundred thousand, one hundred twenty-one".