111211011020 has 24 divisors (see below), whose sum is σ = 233588022864. Its totient is φ = 44475852096.

The previous prime is 111211010993. The next prime is 111211011029. The reversal of 111211011020 is 20110112111.

It is a super-2 number, since 2×111211011020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111211010992 and 111211011010.

It is not an unprimeable number, because it can be changed into a prime (111211011029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427367 + ... + 636446.

It is an arithmetic number, because the mean of its divisors is an integer number (9732834286).

Almost surely, 2^111211011020 is an apocalyptic number.

111211011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211011020 is an abundant number, since it is smaller than the sum of its proper divisors (122377011844).

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

111211011020 is a wasteful number, since it uses less digits than its factorization.

111211011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069049 (or 1069047 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111211011020 its reverse (20110112111), we get a palindrome (131321123131).

The spelling of 111211011020 in words is "one hundred eleven billion, two hundred eleven million, eleven thousand, twenty".