12210012121 has 4 divisors (see below), whose sum is σ = 12328556032. Its totient is φ = 12091468212.

The previous prime is 12210012103. The next prime is 12210012127. The reversal of 12210012121 is 12121001221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12210012121 - 2⁷ = 12210011993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12210012127) 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, 59271801 + ... + 59272006.

It is an arithmetic number, because the mean of its divisors is an integer number (3082139008).

Almost surely, 2^12210012121 is an apocalyptic number.

It is an amenable number.

12210012121 is a deficient number, since it is larger than the sum of its proper divisors (118543911).

12210012121 is a wasteful number, since it uses less digits than its factorization.

12210012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118543910.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12210012121 its reverse (12121001221), we get a palindrome (24331013342).

The spelling of 12210012121 in words is "twelve billion, two hundred ten million, twelve thousand, one hundred twenty-one".