1212130099 has 4 divisors (see below), whose sum is σ = 1275926440. Its totient is φ = 1148333760.

The previous prime is 1212130063. The next prime is 1212130123. The reversal of 1212130099 is 9900312121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212130099 - 2¹⁷ = 1211999027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212130009) 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, 31898142 + ... + 31898179.

It is an arithmetic number, because the mean of its divisors is an integer number (318981610).

Almost surely, 2^1212130099 is an apocalyptic number.

1212130099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1212130099 is a deficient number, since it is larger than the sum of its proper divisors (63796341).

1212130099 is an equidigital number, since it uses as much as digits as its factorization.

1212130099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63796340.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 1212130099 is about 34815.6588189855. The cubic root of 1212130099 is about 1066.2271699924.

The spelling of 1212130099 in words is "one billion, two hundred twelve million, one hundred thirty thousand, ninety-nine".