21141099 has 18 divisors (see below), whose sum is σ = 35523540. Its totient is φ = 12080376.

The previous prime is 21141089. The next prime is 21141103. The reversal of 21141099 is 99014112.

It is not a de Polignac number, because 21141099 - 2⁴ = 21141083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21141089) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23529 + ... + 24410.

It is an arithmetic number, because the mean of its divisors is an integer number (1973530).

Almost surely, 2^21141099 is an apocalyptic number.

21141099 is a deficient number, since it is larger than the sum of its proper divisors (14382441).

21141099 is a wasteful number, since it uses less digits than its factorization.

21141099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47959 (or 47949 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 21141099 is about 4597.9450844915. The cubic root of 21141099 is about 276.5089459264.

The spelling of 21141099 in words is "twenty-one million, one hundred forty-one thousand, ninety-nine".