21212320032030 has 32 divisors (see below), whose sum is σ = 52551812210688. Its totient is φ = 5474147104800.

The previous prime is 21212320031993. The next prime is 21212320032121. The reversal of 21212320032030 is 3023002321212.

It is a happy number.

It is a super-2 number, since 2×21212320032030² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21212320031988 and 21212320032006.

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, 11404472206 + ... + 11404474065.

It is an arithmetic number, because the mean of its divisors is an integer number (1642244131584).

Almost surely, 2^{21212320032030} is an apocalyptic number.

21212320032030 is an abundant number, since it is smaller than the sum of its proper divisors (31339492178658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21212320032030 is a wasteful number, since it uses less digits than its factorization.

21212320032030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22808946312.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21212320032030 its reverse (3023002321212), we get a palindrome (24235322353242).

The spelling of 21212320032030 in words is "twenty-one trillion, two hundred twelve billion, three hundred twenty million, thirty-two thousand, thirty".