21130152215 has 16 divisors (see below), whose sum is σ = 26060819520. Its totient is φ = 16447056480.

The previous prime is 21130152097. The next prime is 21130152221. The reversal of 21130152215 is 51225103112.

It is not a de Polignac number, because 21130152215 - 2¹² = 21130148119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211550 + ... + 294980.

It is an arithmetic number, because the mean of its divisors is an integer number (1628801220).

Almost surely, 2^21130152215 is an apocalyptic number.

21130152215 is a deficient number, since it is larger than the sum of its proper divisors (4930667305).

21130152215 is an frugal number, since it uses more digits than its factorization.

21130152215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83547 (or 83473 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 21130152215 its reverse (51225103112), we get a palindrome (72355255327).

The spelling of 21130152215 in words is "twenty-one billion, one hundred thirty million, one hundred fifty-two thousand, two hundred fifteen".