1212899541899 has 8 divisors (see below), whose sum is σ = 1222308281040. Its totient is φ = 1203493075200.

The previous prime is 1212899541883. The next prime is 1212899541907. The reversal of 1212899541899 is 9981459982121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212899541899 - 2⁴ = 1212899541883 is a prime.

It is a super-2 number, since 2×1212899541899² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212899441899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511439 + ... + 1639319.

It is an arithmetic number, because the mean of its divisors is an integer number (152788535130).

Almost surely, 2^{1212899541899} is an apocalyptic number.

1212899541899 is a deficient number, since it is larger than the sum of its proper divisors (9408739141).

1212899541899 is a wasteful number, since it uses less digits than its factorization.

1212899541899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136221.

The product of its digits is 33592320, while the sum is 68.

The spelling of 1212899541899 in words is "one trillion, two hundred twelve billion, eight hundred ninety-nine million, five hundred forty-one thousand, eight hundred ninety-nine".