1201555033212 has 96 divisors (see below), whose sum is σ = 2982417641280. Its totient is φ = 375198842880.

The previous prime is 1201555033207. The next prime is 1201555033247. The reversal of 1201555033212 is 2123305551021.

It is a self number, because there is not a number n which added to its sum of digits gives 1201555033212.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 115874364 + ... + 115884732.

It is an arithmetic number, because the mean of its divisors is an integer number (31066850430).

Almost surely, 2^{1201555033212} is an apocalyptic number.

1201555033212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201555033212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1491208820640).

1201555033212 is an abundant number, since it is smaller than the sum of its proper divisors (1780862608068).

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

1201555033212 is a wasteful number, since it uses less digits than its factorization.

1201555033212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12991 (or 12989 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 1201555033212 in words is "one trillion, two hundred one billion, five hundred fifty-five million, thirty-three thousand, two hundred twelve".