21220142303 has 8 divisors (see below), whose sum is σ = 21350178960. Its totient is φ = 21090453120.

The previous prime is 21220142269. The next prime is 21220142323. The reversal of 21220142303 is 30324102212.

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

It is a cyclic number.

It is not a de Polignac number, because 21220142303 - 2¹² = 21220138207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220142323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36176 + ... + 209162.

It is an arithmetic number, because the mean of its divisors is an integer number (2668772370).

Almost surely, 2^21220142303 is an apocalyptic number.

21220142303 is a deficient number, since it is larger than the sum of its proper divisors (130036657).

21220142303 is a wasteful number, since it uses less digits than its factorization.

21220142303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173737.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21220142303 its reverse (30324102212), we get a palindrome (51544244515).

The spelling of 21220142303 in words is "twenty-one billion, two hundred twenty million, one hundred forty-two thousand, three hundred three".