12121420233 has 16 divisors (see below), whose sum is σ = 18161861760. Its totient is φ = 7135016064.

The previous prime is 12121420219. The next prime is 12121420247. The reversal of 12121420233 is 33202412121.

It is an interprime number because it is at equal distance from previous prime (12121420219) and next prime (12121420247).

It is not a de Polignac number, because 12121420233 - 2⁴ = 12121420217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12121520233) 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, 6755748 + ... + 6757541.

It is an arithmetic number, because the mean of its divisors is an integer number (1135116360).

Almost surely, 2^12121420233 is an apocalyptic number.

12121420233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12121420233 is a deficient number, since it is larger than the sum of its proper divisors (6040441527).

12121420233 is a wasteful number, since it uses less digits than its factorization.

12121420233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13513328.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12121420233 its reverse (33202412121), we get a palindrome (45323832354).

The spelling of 12121420233 in words is "twelve billion, one hundred twenty-one million, four hundred twenty thousand, two hundred thirty-three".