11211212122099 has 4 divisors (see below), whose sum is σ = 12230413224120. Its totient is φ = 10192011020080.

The previous prime is 11211212122069. The next prime is 11211212122129. The reversal of 11211212122099 is 99022121211211.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (11211212122069) and next prime (11211212122129).

It is a cyclic number.

It is not a de Polignac number, because 11211212122099 - 2⁵ = 11211212122067 is a prime.

It is a super-3 number, since 3×11211212122099³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211212122009) 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, 509600550994 + ... + 509600551015.

It is an arithmetic number, because the mean of its divisors is an integer number (3057603306030).

Almost surely, 2^{11211212122099} is an apocalyptic number.

11211212122099 is a deficient number, since it is larger than the sum of its proper divisors (1019201102021).

11211212122099 is a wasteful number, since it uses less digits than its factorization.

11211212122099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019201102020.

The product of its (nonzero) digits is 2592, while the sum is 34.

It can be divided in two parts, 11211212 and 122099, that added together give a palindrome (11333311).

The spelling of 11211212122099 in words is "eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-two thousand, ninety-nine".