1212112112121 has 24 divisors (see below), whose sum is σ = 1789466829696. Its totient is φ = 790434506400.

The previous prime is 1212112112089. The next prime is 1212112112131.

It is a happy number.

1212112112121 is a `hidden beast` number, since 121 + 211 + 211 + 2 + 121 = 666.

1212112112121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1212112112121 - 2⁵ = 1212112112089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212112112094 and 1212112112103.

It is not an unprimeable number, because it can be changed into a prime (1212112112131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7957425 + ... + 8108318.

It is an arithmetic number, because the mean of its divisors is an integer number (74561117904).

Almost surely, 2^{1212112112121} is an apocalyptic number.

It is an amenable number.

1212112112121 is a deficient number, since it is larger than the sum of its proper divisors (577354717575).

1212112112121 is a wasteful number, since it uses less digits than its factorization.

1212112112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16065933 (or 16065930 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

The spelling of 1212112112121 in words is "one trillion, two hundred twelve billion, one hundred twelve million, one hundred twelve thousand, one hundred twenty-one".