20231220222 has 24 divisors (see below), whose sum is σ = 43887346776. Its totient is φ = 6735580656.

The previous prime is 20231220181. The next prime is 20231220271. The reversal of 20231220222 is 22202213202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20231220195 and 20231220204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 664653 + ... + 694424.

It is an arithmetic number, because the mean of its divisors is an integer number (1828639449).

Almost surely, 2^20231220222 is an apocalyptic number.

20231220222 is an abundant number, since it is smaller than the sum of its proper divisors (23656126554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20231220222 is a wasteful number, since it uses less digits than its factorization.

20231220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359912 (or 1359909 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20231220222 its reverse (22202213202), we get a palindrome (42433433424).

The spelling of 20231220222 in words is "twenty billion, two hundred thirty-one million, two hundred twenty thousand, two hundred twenty-two".