111420265720 has 192 divisors, whose sum is σ = 267271280640. Its totient is φ = 41753875200.

The previous prime is 111420265699. The next prime is 111420265783. The reversal of 111420265720 is 27562024111.

It is a super-3 number, since 3×111420265720³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 358264365 + ... + 358264675.

It is an arithmetic number, because the mean of its divisors is an integer number (1392037920).

Almost surely, 2^111420265720 is an apocalyptic number.

111420265720 is a gapful number since it is divisible by the number (10) 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 111420265720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133635640320).

111420265720 is an abundant number, since it is smaller than the sum of its proper divisors (155851014920).

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

111420265720 is a wasteful number, since it uses less digits than its factorization.

111420265720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

Adding to 111420265720 its reverse (27562024111), we get a palindrome (138982289831).

The spelling of 111420265720 in words is "one hundred eleven billion, four hundred twenty million, two hundred sixty-five thousand, seven hundred twenty".