1221201101112 has 16 divisors (see below), whose sum is σ = 3053002752840. Its totient is φ = 407067033696.

The previous prime is 1221201101093. The next prime is 1221201101129. The reversal of 1221201101112 is 2111011021221.

It is a happy number.

It is a super-2 number, since 2×1221201101112² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221201101091 and 1221201101100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25441689583 + ... + 25441689630.

Almost surely, 2^{1221201101112} is an apocalyptic number.

1221201101112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221201101112 is an abundant number, since it is smaller than the sum of its proper divisors (1831801651728).

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

1221201101112 is a wasteful number, since it uses less digits than its factorization.

1221201101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50883379222 (or 50883379218 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1221201101112 its reverse (2111011021221), we get a palindrome (3332212122333).

The spelling of 1221201101112 in words is "one trillion, two hundred twenty-one billion, two hundred one million, one hundred one thousand, one hundred twelve".