21221032120430 has 8 divisors (see below), whose sum is σ = 38197857816792. Its totient is φ = 8488412848168.

The previous prime is 21221032120403. The next prime is 21221032120447. The reversal of 21221032120430 is 3402123012212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21221032120396 and 21221032120405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061051606012 + ... + 1061051606031.

It is an arithmetic number, because the mean of its divisors is an integer number (4774732227099).

Almost surely, 2^{21221032120430} is an apocalyptic number.

21221032120430 is a deficient number, since it is larger than the sum of its proper divisors (16976825696362).

21221032120430 is a wasteful number, since it uses less digits than its factorization.

21221032120430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122103212050.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21221032120430 its reverse (3402123012212), we get a palindrome (24623155132642).

The spelling of 21221032120430 in words is "twenty-one trillion, two hundred twenty-one billion, thirty-two million, one hundred twenty thousand, four hundred thirty".