1210212121199 has 4 divisors (see below), whose sum is σ = 1262830039536. Its totient is φ = 1157594202864.

The previous prime is 1210212121171. The next prime is 1210212121211. The reversal of 1210212121199 is 9911212120121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210212121199 is a prime.

It is a super-2 number, since 2×1210212121199² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210212121999) 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, 26308959134 + ... + 26308959179.

It is an arithmetic number, because the mean of its divisors is an integer number (315707509884).

Almost surely, 2^{1210212121199} is an apocalyptic number.

1210212121199 is a deficient number, since it is larger than the sum of its proper divisors (52617918337).

1210212121199 is an equidigital number, since it uses as much as digits as its factorization.

1210212121199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52617918336.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 1210212121199 in words is "one trillion, two hundred ten billion, two hundred twelve million, one hundred twenty-one thousand, one hundred ninety-nine".