1212211100099 has 4 divisors (see below), whose sum is σ = 1212235803240. Its totient is φ = 1212186396960.

The previous prime is 1212211100081. The next prime is 1212211100197. The reversal of 1212211100099 is 9900011122121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212211100099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212211100029) 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, 12277817 + ... + 12376154.

It is an arithmetic number, because the mean of its divisors is an integer number (303058950810).

Almost surely, 2^{1212211100099} is an apocalyptic number.

1212211100099 is a deficient number, since it is larger than the sum of its proper divisors (24703141).

1212211100099 is an equidigital number, since it uses as much as digits as its factorization.

1212211100099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24703140.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 1212211100099 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred thousand, ninety-nine".