1321211112 has 32 divisors (see below), whose sum is σ = 3557107680. Its totient is φ = 406526400.

The previous prime is 1321211107. The next prime is 1321211119. The reversal of 1321211112 is 2111121231.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1321211091 and 1321211100.

It is not an unprimeable number, because it can be changed into a prime (1321211119) 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, 2117014 + ... + 2117637.

It is an arithmetic number, because the mean of its divisors is an integer number (111159615).

Almost surely, 2^1321211112 is an apocalyptic number.

1321211112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321211112 is an abundant number, since it is smaller than the sum of its proper divisors (2235896568).

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

1321211112 is a wasteful number, since it uses less digits than its factorization.

1321211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4234673 (or 4234669 counting only the distinct ones).

The product of its digits is 24, while the sum is 15.

The square root of 1321211112 is about 36348.4678081484. The cubic root of 1321211112 is about 1097.2966985918.

Adding to 1321211112 its reverse (2111121231), we get a palindrome (3432332343).

The spelling of 1321211112 in words is "one billion, three hundred twenty-one million, two hundred eleven thousand, one hundred twelve".