1212211212099 has 16 divisors (see below), whose sum is σ = 1650780913152. Its totient is φ = 790893458208.

The previous prime is 1212211212089. The next prime is 1212211212101. The reversal of 1212211212099 is 9902121122121.

It is not a de Polignac number, because 1212211212099 - 2²⁷ = 1212076994371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212211212029) 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, 1887972 + ... + 2447214.

It is an arithmetic number, because the mean of its divisors is an integer number (103173807072).

Almost surely, 2^{1212211212099} is an apocalyptic number.

1212211212099 is a deficient number, since it is larger than the sum of its proper divisors (438569701053).

1212211212099 is a wasteful number, since it uses less digits than its factorization.

1212211212099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574666.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 1212211212099 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred twelve thousand, ninety-nine".