21113510301151 has 4 divisors (see below), whose sum is σ = 21459633420904. Its totient is φ = 20767387181400.

The previous prime is 21113510301131. The next prime is 21113510301211. The reversal of 21113510301151 is 15110301531112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21113510301151 - 2²³ = 21113501912543 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 (21113510301131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173061559785 + ... + 173061559906.

It is an arithmetic number, because the mean of its divisors is an integer number (5364908355226).

Almost surely, 2^{21113510301151} is an apocalyptic number.

21113510301151 is a deficient number, since it is larger than the sum of its proper divisors (346123119753).

21113510301151 is an equidigital number, since it uses as much as digits as its factorization.

21113510301151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346123119752.

The product of its (nonzero) digits is 450, while the sum is 25.

Adding to 21113510301151 its reverse (15110301531112), we get a palindrome (36223811832263).

The spelling of 21113510301151 in words is "twenty-one trillion, one hundred thirteen billion, five hundred ten million, three hundred one thousand, one hundred fifty-one".