111021012220100 has 36 divisors (see below), whose sum is σ = 240923932920468. Its totient is φ = 44406868224000.

The previous prime is 111021012220051. The next prime is 111021012220121. The reversal of 111021012220100 is 1022210120111.

It can be written as a sum of positive squares in 6 ways, for example, as 3130910835844 + 107890101384256 = 1769438^2 + 10387016^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16301741 + ... + 22085940.

It is an arithmetic number, because the mean of its divisors is an integer number (6692331470013).

Almost surely, 2^{111021012220100} is an apocalyptic number.

111021012220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021012220100 is an abundant number, since it is smaller than the sum of its proper divisors (129902920700368).

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

111021012220100 is a wasteful number, since it uses less digits than its factorization.

111021012220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38416616 (or 38416609 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111021012220100 its reverse (1022210120111), we get a palindrome (112043222340211).

The spelling of 111021012220100 in words is "one hundred eleven trillion, twenty-one billion, twelve million, two hundred twenty thousand, one hundred".