121212031199 has 16 divisors (see below), whose sum is σ = 144651168768. Its totient is φ = 99309938112.

The previous prime is 121212031183. The next prime is 121212031207. The reversal of 121212031199 is 991130212121.

It is a happy number.

It is not a de Polignac number, because 121212031199 - 2⁴ = 121212031183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212039199) 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, 27182 + ... + 493115.

It is an arithmetic number, because the mean of its divisors is an integer number (9040698048).

Almost surely, 2^121212031199 is an apocalyptic number.

121212031199 is a deficient number, since it is larger than the sum of its proper divisors (23439137569).

121212031199 is a wasteful number, since it uses less digits than its factorization.

121212031199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521774.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 121212031199 in words is "one hundred twenty-one billion, two hundred twelve million, thirty-one thousand, one hundred ninety-nine".