12212134555 has 16 divisors (see below), whose sum is σ = 15040438560. Its totient is φ = 9515734272.

The previous prime is 12212134553. The next prime is 12212134621. The reversal of 12212134555 is 55543121221.

It is a cyclic number.

It is not a de Polignac number, because 12212134555 - 2¹ = 12212134553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12212134553) 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, 174984 + ... + 234613.

It is an arithmetic number, because the mean of its divisors is an integer number (940027410).

Almost surely, 2^12212134555 is an apocalyptic number.

12212134555 is a deficient number, since it is larger than the sum of its proper divisors (2828304005).

12212134555 is an equidigital number, since it uses as much as digits as its factorization.

12212134555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409758.

The product of its digits is 12000, while the sum is 31.

Adding to 12212134555 its reverse (55543121221), we get a palindrome (67755255776).

The spelling of 12212134555 in words is "twelve billion, two hundred twelve million, one hundred thirty-four thousand, five hundred fifty-five".