21215035030 has 64 divisors (see below), whose sum is σ = 43845193728. Its totient is φ = 7240020480.

The previous prime is 21215035027. The next prime is 21215035033. The reversal of 21215035030 is 3053051212.

It is an interprime number because it is at equal distance from previous prime (21215035027) and next prime (21215035033).

It is a super-2 number, since 2×21215035030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21215034992 and 21215035010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21215035033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24080190 + ... + 24081070.

It is an arithmetic number, because the mean of its divisors is an integer number (685081152).

Almost surely, 2^21215035030 is an apocalyptic number.

21215035030 is an abundant number, since it is smaller than the sum of its proper divisors (22630158698).

21215035030 is a wasteful number, since it uses less digits than its factorization.

21215035030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 21215035030 its reverse (3053051212), we get a palindrome (24268086242).

The spelling of 21215035030 in words is "twenty-one billion, two hundred fifteen million, thirty-five thousand, thirty".