21230130153505 has 32 divisors (see below), whose sum is σ = 31796892707328. Its totient is φ = 13248705254400.

The previous prime is 21230130153437. The next prime is 21230130153523. The reversal of 21230130153505 is 50535103103212.

It is not a de Polignac number, because 21230130153505 - 2¹¹ = 21230130151457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328556616 + ... + 328621225.

It is an arithmetic number, because the mean of its divisors is an integer number (993652897104).

Almost surely, 2^{21230130153505} is an apocalyptic number.

It is an amenable number.

21230130153505 is a deficient number, since it is larger than the sum of its proper divisors (10566762553823).

21230130153505 is a wasteful number, since it uses less digits than its factorization.

21230130153505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657177937.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 21230130153505 its reverse (50535103103212), we get a palindrome (71765233256717).

The spelling of 21230130153505 in words is "twenty-one trillion, two hundred thirty billion, one hundred thirty million, one hundred fifty-three thousand, five hundred five".