21221023102130 has 8 divisors (see below), whose sum is σ = 38197841583852. Its totient is φ = 8488409240848.

The previous prime is 21221023102091. The next prime is 21221023102133. The reversal of 21221023102130 is 3120132012212.

It can be written as a sum of positive squares in 2 ways, for example, as 18563663422249 + 2657359679881 = 4308557^2 + 1630141^2 .

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

It is a super-2 number, since 2×21221023102130² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21221023102133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061051155097 + ... + 1061051155116.

Almost surely, 2^{21221023102130} is an apocalyptic number.

21221023102130 is a deficient number, since it is larger than the sum of its proper divisors (16976818481722).

21221023102130 is a wasteful number, since it uses less digits than its factorization.

21221023102130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122102310220.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21221023102130 its reverse (3120132012212), we get a palindrome (24341155114342).

The spelling of 21221023102130 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-three million, one hundred two thousand, one hundred thirty".