21220010030 has 32 divisors (see below), whose sum is σ = 38613183840. Its totient is φ = 8395407360.

The previous prime is 21220010023. The next prime is 21220010047. The reversal of 21220010030 is 3001002212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21220009993 and 21220010020.

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, 1867406 + ... + 1878734.

It is an arithmetic number, because the mean of its divisors is an integer number (1206661995).

Almost surely, 2^21220010030 is an apocalyptic number.

21220010030 is a deficient number, since it is larger than the sum of its proper divisors (17393173810).

21220010030 is a wasteful number, since it uses less digits than its factorization.

21220010030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13364.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21220010030 its reverse (3001002212), we get a palindrome (24221012242).

The spelling of 21220010030 in words is "twenty-one billion, two hundred twenty million, ten thousand, thirty".