101111321220 has 96 divisors (see below), whose sum is σ = 348445187328. Its totient is φ = 21333376512.

The previous prime is 101111321197. The next prime is 101111321237. The reversal of 101111321220 is 22123111101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 101111321220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9253819 + ... + 9264738.

It is an arithmetic number, because the mean of its divisors is an integer number (3629637368).

Almost surely, 2^101111321220 is an apocalyptic number.

101111321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101111321220 is an abundant number, since it is smaller than the sum of its proper divisors (247333866108).

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

101111321220 is a wasteful number, since it uses less digits than its factorization.

101111321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18518589 (or 18518587 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 101111321220 its reverse (22123111101), we get a palindrome (123234432321).

It can be divided in two parts, 10111 and 1321220, that added together give a palindrome (1331331).

The spelling of 101111321220 in words is "one hundred one billion, one hundred eleven million, three hundred twenty-one thousand, two hundred twenty".