111201001212 has 144 divisors (see below), whose sum is σ = 309380335488. Its totient is φ = 30986524800.

The previous prime is 111201001189. The next prime is 111201001333. The reversal of 111201001212 is 212100102111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3965023 + ... + 3992969.

It is an arithmetic number, because the mean of its divisors is an integer number (2148474552).

Almost surely, 2^111201001212 is an apocalyptic number.

111201001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111201001212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154690167744).

111201001212 is an abundant number, since it is smaller than the sum of its proper divisors (198179334276).

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

111201001212 is a wasteful number, since it uses less digits than its factorization.

111201001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28136 (or 28127 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111201001212 its reverse (212100102111), we get a palindrome (323301103323).

The spelling of 111201001212 in words is "one hundred eleven billion, two hundred one million, one thousand, two hundred twelve".