210012102111121 has 4 divisors (see below), whose sum is σ = 210012171605172. Its totient is φ = 210012032617072.

The previous prime is 210012102111107. The next prime is 210012102111127. The reversal of 210012102111121 is 121111201210012.

210012102111121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20065821701121 + 189946280410000 = 4479489^2 + 13782100^2 .

It is a cyclic number.

It is not a de Polignac number, because 210012102111121 - 2²⁷ = 210011967893393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210012102111095 and 210012102111104.

It is not an unprimeable number, because it can be changed into a prime (210012102111127) 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, 29997610 + ... + 36330163.

It is an arithmetic number, because the mean of its divisors is an integer number (52503042901293).

Almost surely, 2^{210012102111121} is an apocalyptic number.

It is an amenable number.

210012102111121 is a deficient number, since it is larger than the sum of its proper divisors (69494051).

210012102111121 is an equidigital number, since it uses as much as digits as its factorization.

210012102111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69494050.

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

Adding to 210012102111121 its reverse (121111201210012), we get a palindrome (331123303321133).

The spelling of 210012102111121 in words is "two hundred ten trillion, twelve billion, one hundred two million, one hundred eleven thousand, one hundred twenty-one".