101221100075 has 12 divisors (see below), whose sum is σ = 125863796880. Its totient is φ = 80751310560.

The previous prime is 101221100051. The next prime is 101221100077. The reversal of 101221100075 is 570001122101.

It is a happy number.

It is not a de Polignac number, because 101221100075 - 2²⁴ = 101204322859 is a prime.

It is a super-2 number, since 2×101221100075² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101221100077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5630084 + ... + 5648033.

It is an arithmetic number, because the mean of its divisors is an integer number (10488649740).

Almost surely, 2^101221100075 is an apocalyptic number.

101221100075 is a deficient number, since it is larger than the sum of its proper divisors (24642696805).

101221100075 is a wasteful number, since it uses less digits than its factorization.

101221100075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11278486 (or 11278481 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 20.

Adding to 101221100075 its reverse (570001122101), we get a palindrome (671222222176).

The spelling of 101221100075 in words is "one hundred one billion, two hundred twenty-one million, one hundred thousand, seventy-five".