1212111221199 has 12 divisors (see below), whose sum is σ = 1635854587416. Its totient is φ = 798338300752.

The previous prime is 1212111221183. The next prime is 1212111221221. The reversal of 1212111221199 is 9911221112121.

It is not a de Polignac number, because 1212111221199 - 2⁴ = 1212111221183 is a prime.

It is a super-2 number, since 2×1212111221199² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212111221149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29304132 + ... + 29345465.

It is an arithmetic number, because the mean of its divisors is an integer number (136321215618).

Almost surely, 2^{1212111221199} is an apocalyptic number.

1212111221199 is a deficient number, since it is larger than the sum of its proper divisors (423743366217).

1212111221199 is an frugal number, since it uses more digits than its factorization.

1212111221199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58649766 (or 58649683 counting only the distinct ones).

The product of its digits is 1296, while the sum is 33.

The spelling of 1212111221199 in words is "one trillion, two hundred twelve billion, one hundred eleven million, two hundred twenty-one thousand, one hundred ninety-nine".