21025119 has 16 divisors (see below), whose sum is σ = 28591200. Its totient is φ = 13741056.

The previous prime is 21025117. The next prime is 21025127. The reversal of 21025119 is 91152012.

It is not a de Polignac number, because 21025119 - 2¹ = 21025117 is a prime.

It is a super-2 number, since 2×21025119² = 884111257928322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21025095 and 21025104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21025117) 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, 36667 + ... + 37235.

It is an arithmetic number, because the mean of its divisors is an integer number (1786950).

Almost surely, 2^21025119 is an apocalyptic number.

21025119 is a deficient number, since it is larger than the sum of its proper divisors (7566081).

21025119 is a wasteful number, since it uses less digits than its factorization.

21025119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 21025119 is about 4585.3155834686. The cubic root of 21025119 is about 276.0023760560.

The spelling of 21025119 in words is "twenty-one million, twenty-five thousand, one hundred nineteen".