1210155442212 has 12 divisors (see below), whose sum is σ = 2823696031856. Its totient is φ = 403385147400.

The previous prime is 1210155442183. The next prime is 1210155442213. The reversal of 1210155442212 is 2122445510121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1210155442212.

It is not an unprimeable number, because it can be changed into a prime (1210155442213) 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, 50423143414 + ... + 50423143437.

Almost surely, 2^{1210155442212} is an apocalyptic number.

1210155442212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1210155442212 is an abundant number, since it is smaller than the sum of its proper divisors (1613540589644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1210155442212 is a wasteful number, since it uses less digits than its factorization.

1210155442212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100846286858 (or 100846286856 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The spelling of 1210155442212 in words is "one trillion, two hundred ten billion, one hundred fifty-five million, four hundred forty-two thousand, two hundred twelve".