21114151405 has 8 divisors (see below), whose sum is σ = 25357275000. Its totient is φ = 16877792256.

The previous prime is 21114151393. The next prime is 21114151433. The reversal of 21114151405 is 50415141112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7234012809 + 13880138596 = 85053^2 + 117814^2 .

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 21114151405 - 2²⁷ = 20979933677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21114151405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1684240 + ... + 1696729.

It is an arithmetic number, because the mean of its divisors is an integer number (3169659375).

Almost surely, 2^21114151405 is an apocalyptic number.

It is an amenable number.

21114151405 is a deficient number, since it is larger than the sum of its proper divisors (4243123595).

21114151405 is a wasteful number, since it uses less digits than its factorization.

21114151405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382223.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 21114151405 its reverse (50415141112), we get a palindrome (71529292517).

The spelling of 21114151405 in words is "twenty-one billion, one hundred fourteen million, one hundred fifty-one thousand, four hundred five".