101111101220 has 48 divisors (see below), whose sum is σ = 217620079488. Its totient is φ = 39438416640.

The previous prime is 101111101199. The next prime is 101111101243. The reversal of 101111101220 is 22101111101.

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 15 ways as a sum of consecutive naturals, for example, 1681799 + ... + 1740881.

It is an arithmetic number, because the mean of its divisors is an integer number (4533751656).

Almost surely, 2^101111101220 is an apocalyptic number.

101111101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101111101220 is an abundant number, since it is smaller than the sum of its proper divisors (116508978268).

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

101111101220 is a wasteful number, since it uses less digits than its factorization.

101111101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61220 (or 61218 counting only the distinct ones).

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

Adding to 101111101220 its reverse (22101111101), we get a palindrome (123212212321).

The spelling of 101111101220 in words is "one hundred one billion, one hundred eleven million, one hundred one thousand, two hundred twenty".