1201221211112 has 32 divisors (see below), whose sum is σ = 2426220919080. Its totient is φ = 554254798080.

The previous prime is 1201221211111. The next prime is 1201221211147. The reversal of 1201221211112 is 2111121221021.

It can be written as a sum of positive squares in 4 ways, for example, as 928459436356 + 272761774756 = 963566^2 + 522266^2 .

It is a super-4 number, since 4×1201221211112⁴ (a number of 49 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1201221211111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1240283 + ... + 1985130.

Almost surely, 2^{1201221211112} is an apocalyptic number.

It is an amenable number.

1201221211112 is an abundant number, since it is smaller than the sum of its proper divisors (1224999707968).

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

1201221211112 is a wasteful number, since it uses less digits than its factorization.

1201221211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229013 (or 3229009 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1201221211112 its reverse (2111121221021), we get a palindrome (3312342432133).

Subtracting 1201221211112 from its reverse (2111121221021), we obtain a palindrome (909900009909).

The spelling of 1201221211112 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twelve".