1201031221212 has 36 divisors (see below), whose sum is σ = 3117992468136. Its totient is φ = 389523638880.

The previous prime is 1201031221177. The next prime is 1201031221217. The reversal of 1201031221212 is 2121221301021.

1201031221212 is a `hidden beast` number, since 1 + 201 + 0 + 31 + 221 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201031221217) 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, 450836214 + ... + 450838877.

Almost surely, 2^{1201031221212} is an apocalyptic number.

1201031221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1201031221212 is an abundant number, since it is smaller than the sum of its proper divisors (1916961246924).

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

1201031221212 is a wasteful number, since it uses less digits than its factorization.

1201031221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901675138 (or 901675133 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1201031221212 its reverse (2121221301021), we get a palindrome (3322252522233).

The spelling of 1201031221212 in words is "one trillion, two hundred one billion, thirty-one million, two hundred twenty-one thousand, two hundred twelve".