101111131220 has 48 divisors (see below), whose sum is σ = 241707570048. Its totient is φ = 35169087360.

The previous prime is 101111131211. The next prime is 101111131237. The reversal of 101111131220 is 22131111101.

It is a junction number, because it is equal to n+sod(n) for n = 101111131195 and 101111131204.

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, 9986159 + ... + 9996278.

It is an arithmetic number, because the mean of its divisors is an integer number (5035574376).

Almost surely, 2^101111131220 is an apocalyptic number.

101111131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101111131220 is an abundant number, since it is smaller than the sum of its proper divisors (140596438828).

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

101111131220 is a wasteful number, since it uses less digits than its factorization.

101111131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19982480 (or 19982478 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 101111131220 its reverse (22131111101), we get a palindrome (123242242321).

The spelling of 101111131220 in words is "one hundred one billion, one hundred eleven million, one hundred thirty-one thousand, two hundred twenty".