111020010121 has 4 divisors (see below), whose sum is σ = 112119218244. Its totient is φ = 109920802000.

The previous prime is 111020010071. The next prime is 111020010197. The reversal of 111020010121 is 121010020111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121010020111 = 101 ⋅1198119011.

It can be written as a sum of positive squares in 2 ways, for example, as 83022354496 + 27997655625 = 288136^2 + 167325^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020010121 - 2⁹ = 111020009609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111020010098 and 111020010107.

It is not an unprimeable number, because it can be changed into a prime (111020011121) 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, 549603910 + ... + 549604111.

It is an arithmetic number, because the mean of its divisors is an integer number (28029804561).

Almost surely, 2^111020010121 is an apocalyptic number.

It is an amenable number.

111020010121 is a deficient number, since it is larger than the sum of its proper divisors (1099208123).

111020010121 is a wasteful number, since it uses less digits than its factorization.

111020010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099208122.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111020010121 its reverse (121010020111), we get a palindrome (232030030232).

The spelling of 111020010121 in words is "one hundred eleven billion, twenty million, ten thousand, one hundred twenty-one".