212012222222121 has 8 divisors (see below), whose sum is σ = 282810240307584. Its totient is φ = 141277842809040.

The previous prime is 212012222222113. The next prime is 212012222222147. The reversal of 212012222222121 is 121222222210212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212012222222121 - 2³ = 212012222222113 is a prime.

It is a super-3 number, since 3×212012222222121³ (a number of 44 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212012222222091 and 212012222222100.

It is not an unprimeable number, because it can be changed into a prime (212012222222221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15909660321 + ... + 15909673646.

It is an arithmetic number, because the mean of its divisors is an integer number (35351280038448).

Almost surely, 2^{212012222222121} is an apocalyptic number.

It is an amenable number.

212012222222121 is a deficient number, since it is larger than the sum of its proper divisors (70798018085463).

212012222222121 is a wasteful number, since it uses less digits than its factorization.

212012222222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31819336191.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 212012222222121 its reverse (121222222210212), we get a palindrome (333234444432333).

The spelling of 212012222222121 in words is "two hundred twelve trillion, twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".