101126721 has 16 divisors (see below), whose sum is σ = 142419200. Its totient is φ = 63650448.

The previous prime is 101126719. The next prime is 101126749. The reversal of 101126721 is 127621101.

It is a happy number.

It is not a de Polignac number, because 101126721 - 2¹ = 101126719 is a prime.

It is a super-2 number, since 2×101126721² = 20453227400423682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101126321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14610 + ... + 20388.

It is an arithmetic number, because the mean of its divisors is an integer number (8901200).

Almost surely, 2^101126721 is an apocalyptic number.

It is an amenable number.

101126721 is a deficient number, since it is larger than the sum of its proper divisors (41292479).

101126721 is a wasteful number, since it uses less digits than its factorization.

101126721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6108.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 101126721 is about 10056.1782502102. The cubic root of 101126721 is about 465.8956353561.

Adding to 101126721 its reverse (127621101), we get a palindrome (228747822).

The spelling of 101126721 in words is "one hundred one million, one hundred twenty-six thousand, seven hundred twenty-one".