21003214215 has 8 divisors (see below), whose sum is σ = 33605142768. Its totient is φ = 11201714240.

The previous prime is 21003214189. The next prime is 21003214229. The reversal of 21003214215 is 51241230012.

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

It is not a de Polignac number, because 21003214215 - 2⁶ = 21003214151 is a prime.

It is a super-2 number, since 2×21003214215² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003214191 and 21003214200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700107126 + ... + 700107155.

It is an arithmetic number, because the mean of its divisors is an integer number (4200642846).

Almost surely, 2^21003214215 is an apocalyptic number.

21003214215 is a deficient number, since it is larger than the sum of its proper divisors (12601928553).

21003214215 is a wasteful number, since it uses less digits than its factorization.

21003214215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400214289.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21003214215 its reverse (51241230012), we get a palindrome (72244444227).

The spelling of 21003214215 in words is "twenty-one billion, three million, two hundred fourteen thousand, two hundred fifteen".