20021223331 has 8 divisors (see below), whose sum is σ = 20305763424. Its totient is φ = 19736754240.

The previous prime is 20021223317. The next prime is 20021223349. The reversal of 20021223331 is 13332212002.

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 20021223331 - 2¹³ = 20021215139 is a prime.

It is a super-2 number, since 2×20021223331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021223299 and 20021223308.

It is not an unprimeable number, because it can be changed into a prime (20021223311) 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, 845505 + ... + 868861.

It is an arithmetic number, because the mean of its divisors is an integer number (2538220428).

Almost surely, 2^20021223331 is an apocalyptic number.

20021223331 is a deficient number, since it is larger than the sum of its proper divisors (284540093).

20021223331 is a wasteful number, since it uses less digits than its factorization.

20021223331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35501.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20021223331 its reverse (13332212002), we get a palindrome (33353435333).

The spelling of 20021223331 in words is "twenty billion, twenty-one million, two hundred twenty-three thousand, three hundred thirty-one".