212220000121 has 16 divisors (see below), whose sum is σ = 223264456704. Its totient is φ = 201328064784.

The previous prime is 212220000071. The next prime is 212220000127. The reversal of 212220000121 is 121000022212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212220000121 - 2¹¹ = 212219998073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212220000127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10350546 + ... + 10371028.

It is an arithmetic number, because the mean of its divisors is an integer number (13954028544).

Almost surely, 2^212220000121 is an apocalyptic number.

It is an amenable number.

212220000121 is a deficient number, since it is larger than the sum of its proper divisors (11044456583).

212220000121 is a wasteful number, since it uses less digits than its factorization.

212220000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24180.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212220000121 its reverse (121000022212), we get a palindrome (333220022333).

The spelling of 212220000121 in words is "two hundred twelve billion, two hundred twenty million, one hundred twenty-one", and thus it is an aban number.