101221011105 has 32 divisors (see below), whose sum is σ = 163119916800. Its totient is φ = 53596128000.

The previous prime is 101221011077. The next prime is 101221011131. The reversal of 101221011105 is 501110122101.

It is not a de Polignac number, because 101221011105 - 2¹⁵ = 101220978337 is a prime.

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

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, 5114980 + ... + 5134730.

It is an arithmetic number, because the mean of its divisors is an integer number (5097497400).

Almost surely, 2^101221011105 is an apocalyptic number.

101221011105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

101221011105 is a deficient number, since it is larger than the sum of its proper divisors (61898905695).

101221011105 is a wasteful number, since it uses less digits than its factorization.

101221011105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22201.

The product of its (nonzero) digits is 20, while the sum is 15.

Adding to 101221011105 its reverse (501110122101), we get a palindrome (602331133206).

The spelling of 101221011105 in words is "one hundred one billion, two hundred twenty-one million, eleven thousand, one hundred five".