214100721 has 24 divisors (see below), whose sum is σ = 339693120. Its totient is φ = 129339936.

The previous prime is 214100659. The next prime is 214100749. The reversal of 214100721 is 127001412.

It is not a de Polignac number, because 214100721 - 2⁶ = 214100657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 214100694 and 214100703.

It is not an unprimeable number, because it can be changed into a prime (214100221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23286 + ... + 31151.

It is an arithmetic number, because the mean of its divisors is an integer number (14153880).

Almost surely, 2^214100721 is an apocalyptic number.

It is an amenable number.

214100721 is a deficient number, since it is larger than the sum of its proper divisors (125592399).

214100721 is a wasteful number, since it uses less digits than its factorization.

214100721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54485 (or 54482 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 214100721 is about 14632.1810062615. The cubic root of 214100721 is about 598.2362285979.

The spelling of 214100721 in words is "two hundred fourteen million, one hundred thousand, seven hundred twenty-one".