21140235151 has 8 divisors (see below), whose sum is σ = 24374077344. Its totient is φ = 17959845120.

The previous prime is 21140235119. The next prime is 21140235173. The reversal of 21140235151 is 15153204112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21140235151 - 2⁵ = 21140235119 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 (21140235251) 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, 13362190 + ... + 13363771.

It is an arithmetic number, because the mean of its divisors is an integer number (3046759668).

Almost surely, 2^21140235151 is an apocalyptic number.

21140235151 is a deficient number, since it is larger than the sum of its proper divisors (3233842193).

21140235151 is a wasteful number, since it uses less digits than its factorization.

21140235151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26726081.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 21140235151 its reverse (15153204112), we get a palindrome (36293439263).

The spelling of 21140235151 in words is "twenty-one billion, one hundred forty million, two hundred thirty-five thousand, one hundred fifty-one".