21225032086 has 24 divisors (see below), whose sum is σ = 33300111600. Its totient is φ = 10145571216.

The previous prime is 21225032077. The next prime is 21225032093. The reversal of 21225032086 is 68023052212.

It is a super-2 number, since 2×21225032086² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2464015 + ... + 2472613.

It is an arithmetic number, because the mean of its divisors is an integer number (1387504650).

Almost surely, 2^21225032086 is an apocalyptic number.

21225032086 is a deficient number, since it is larger than the sum of its proper divisors (12075079514).

21225032086 is a wasteful number, since it uses less digits than its factorization.

21225032086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10980 (or 10957 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 21225032086 its reverse (68023052212), we get a palindrome (89248084298).

The spelling of 21225032086 in words is "twenty-one billion, two hundred twenty-five million, thirty-two thousand, eighty-six".