21025042151 has 8 divisors (see below), whose sum is σ = 21194041344. Its totient is φ = 20856097080.

The previous prime is 21025042123. The next prime is 21025042153. The reversal of 21025042151 is 15124052012.

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 21025042151 - 2²⁶ = 20957933287 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 (21025042153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1196636 + ... + 1214078.

It is an arithmetic number, because the mean of its divisors is an integer number (2649255168).

Almost surely, 2^21025042151 is an apocalyptic number.

21025042151 is a deficient number, since it is larger than the sum of its proper divisors (168999193).

21025042151 is a wasteful number, since it uses less digits than its factorization.

21025042151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27061.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 21025042151 its reverse (15124052012), we get a palindrome (36149094163).

The spelling of 21025042151 in words is "twenty-one billion, twenty-five million, forty-two thousand, one hundred fifty-one".