111201221000 has 32 divisors (see below), whose sum is σ = 260210859480. Its totient is φ = 44480488000.

The previous prime is 111201220997. The next prime is 111201221009. The reversal of 111201221000 is 122102111.

It can be written as a sum of positive squares in 4 ways, for example, as 26477147524 + 84724073476 = 162718^2 + 291074^2 .

It is not an unprimeable number, because it can be changed into a prime (111201221009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55599611 + ... + 55601610.

Almost surely, 2^111201221000 is an apocalyptic number.

111201221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201221000 is an abundant number, since it is smaller than the sum of its proper divisors (149009638480).

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

111201221000 is a wasteful number, since it uses less digits than its factorization.

111201221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111201242 (or 111201228 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111201221000 its reverse (122102111), we get a palindrome (111323323111).

The spelling of 111201221000 in words is "one hundred eleven billion, two hundred one million, two hundred twenty-one thousand".