111012221212220 has 96 divisors (see below), whose sum is σ = 235555960768128. Its totient is φ = 43944763584512.

The previous prime is 111012221212157. The next prime is 111012221212289. The reversal of 111012221212220 is 22212122210111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111012221212192 and 111012221212201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 902352152 + ... + 902475168.

It is an arithmetic number, because the mean of its divisors is an integer number (2453707924668).

Almost surely, 2^{111012221212220} is an apocalyptic number.

111012221212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111012221212220 is an abundant number, since it is smaller than the sum of its proper divisors (124543739555908).

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

111012221212220 is a wasteful number, since it uses less digits than its factorization.

111012221212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124439 (or 124437 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111012221212220 its reverse (22212122210111), we get a palindrome (133224343422331).

The spelling of 111012221212220 in words is "one hundred eleven trillion, twelve billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twenty".