21331011530151 has 12 divisors (see below), whose sum is σ = 30815077154160. Its totient is φ = 14219005404960.

The previous prime is 21331011530131. The next prime is 21331011530233. The reversal of 21331011530151 is 15103511013312.

21331011530151 is a `hidden beast` number, since 2 + 13 + 3 + 101 + 1 + 530 + 15 + 1 = 666.

It is not a de Polignac number, because 21331011530151 - 2¹⁰ = 21331011529127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331011530131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138998091 + ... + 139151468.

It is an arithmetic number, because the mean of its divisors is an integer number (2567923096180).

Almost surely, 2^{21331011530151} is an apocalyptic number.

21331011530151 is a deficient number, since it is larger than the sum of its proper divisors (9484065624009).

21331011530151 is a wasteful number, since it uses less digits than its factorization.

21331011530151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278158086 (or 278158083 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

Adding to 21331011530151 its reverse (15103511013312), we get a palindrome (36434522543463).

The spelling of 21331011530151 in words is "twenty-one trillion, three hundred thirty-one billion, eleven million, five hundred thirty thousand, one hundred fifty-one".