1201221021112 has 32 divisors (see below), whose sum is σ = 2633906563200. Its totient is φ = 502836705504.

The previous prime is 1201221021097. The next prime is 1201221021127. The reversal of 1201221021112 is 2111201221021.

It is an interprime number because it is at equal distance from previous prime (1201221021097) and next prime (1201221021127).

It is a super-2 number, since 2×1201221021112² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249420562 + ... + 249425377.

It is an arithmetic number, because the mean of its divisors is an integer number (82309580100).

Almost surely, 2^{1201221021112} is an apocalyptic number.

It is an amenable number.

1201221021112 is an abundant number, since it is smaller than the sum of its proper divisors (1432685542088).

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

1201221021112 is a wasteful number, since it uses less digits than its factorization.

1201221021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498845995 (or 498845991 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1201221021112 its reverse (2111201221021), we get a palindrome (3312422242133).

The spelling of 1201221021112 in words is "one trillion, two hundred one billion, two hundred twenty-one million, twenty-one thousand, one hundred twelve".