106011721 has 8 divisors (see below), whose sum is σ = 107339904. Its totient is φ = 104689200.

The previous prime is 106011709. The next prime is 106011739. The reversal of 106011721 is 127110601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 106011721 - 2⁷ = 106011593 is a prime.

It is a super-2 number, since 2×106011721² = 22476969978763682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106011701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45630 + ... + 47896.

It is an arithmetic number, because the mean of its divisors is an integer number (13417488).

Almost surely, 2^106011721 is an apocalyptic number.

It is an amenable number.

106011721 is a deficient number, since it is larger than the sum of its proper divisors (1328183).

106011721 is a wasteful number, since it uses less digits than its factorization.

106011721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 106011721 is about 10296.1993473320. The cubic root of 106011721 is about 473.2797922093.

The spelling of 106011721 in words is "one hundred six million, eleven thousand, seven hundred twenty-one".