1212998099 has 2 divisors, whose sum is σ = 1212998100. Its totient is φ = 1212998098.

The previous prime is 1212998089. The next prime is 1212998119. The reversal of 1212998099 is 9908992121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212998099 is a prime.

It is a super-2 number, since 2×1212998099² = 2942728776355227602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212998089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606499049 + 606499050.

It is an arithmetic number, because the mean of its divisors is an integer number (606499050).

Almost surely, 2^1212998099 is an apocalyptic number.

1212998099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212998099 is an equidigital number, since it uses as much as digits as its factorization.

1212998099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 1212998099 is about 34828.1222433826. The cubic root of 1212998099 is about 1066.4816158258.

The spelling of 1212998099 in words is "one billion, two hundred twelve million, nine hundred ninety-eight thousand, ninety-nine".