21116029 has 8 divisors (see below), whose sum is σ = 23184288. Its totient is φ = 19072560.

The previous prime is 21115999. The next prime is 21116059. The reversal of 21116029 is 92061112.

It is an interprime number because it is at equal distance from previous prime (21115999) and next prime (21116059).

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 21116029 - 2²¹ = 19018877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21116059) 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, 4387 + ... + 7840.

It is an arithmetic number, because the mean of its divisors is an integer number (2898036).

Almost surely, 2^21116029 is an apocalyptic number.

It is an amenable number.

21116029 is a deficient number, since it is larger than the sum of its proper divisors (2068259).

21116029 is a wasteful number, since it uses less digits than its factorization.

21116029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12395.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 21116029 is about 4595.2180579381. The cubic root of 21116029 is about 276.3996040674.

The spelling of 21116029 in words is "twenty-one million, one hundred sixteen thousand, twenty-nine".