222123514121 has 4 divisors (see below), whose sum is σ = 223538313732. Its totient is φ = 220708714512.

The previous prime is 222123514097. The next prime is 222123514133. The reversal of 222123514121 is 121415321222.

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 90745537600 + 131377976521 = 301240^2 + 362461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222123514121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222123514021) 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, 707399570 + ... + 707399883.

It is an arithmetic number, because the mean of its divisors is an integer number (55884578433).

Almost surely, 2^222123514121 is an apocalyptic number.

It is an amenable number.

222123514121 is a deficient number, since it is larger than the sum of its proper divisors (1414799611).

222123514121 is a wasteful number, since it uses less digits than its factorization.

222123514121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414799610.

The product of its digits is 1920, while the sum is 26.

Adding to 222123514121 its reverse (121415321222), we get a palindrome (343538835343).

The spelling of 222123514121 in words is "two hundred twenty-two billion, one hundred twenty-three million, five hundred fourteen thousand, one hundred twenty-one".