111420051220 has 48 divisors (see below), whose sum is σ = 247789453968. Its totient is φ = 41938974720.

The previous prime is 111420051217. The next prime is 111420051251. The reversal of 111420051220 is 22150024111.

It can be written as a sum of positive squares in 8 ways, for example, as 10400328324 + 101019722896 = 101982^2 + 317836^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2141110 + ... + 2192530.

It is an arithmetic number, because the mean of its divisors is an integer number (5162280291).

Almost surely, 2^111420051220 is an apocalyptic number.

111420051220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111420051220 is an abundant number, since it is smaller than the sum of its proper divisors (136369402748).

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

111420051220 is a wasteful number, since it uses less digits than its factorization.

111420051220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57820 (or 57818 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 111420051220 its reverse (22150024111), we get a palindrome (133570075331).

The spelling of 111420051220 in words is "one hundred eleven billion, four hundred twenty million, fifty-one thousand, two hundred twenty".