201023231022 has 24 divisors (see below), whose sum is σ = 435886198176. Its totient is φ = 66956072256.

The previous prime is 201023231009. The next prime is 201023231027. The reversal of 201023231022 is 220132320102.

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 = 201023230986 and 201023231004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201023231027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4281958 + ... + 4328649.

It is an arithmetic number, because the mean of its divisors is an integer number (18161924924).

Almost surely, 2^201023231022 is an apocalyptic number.

201023231022 is an abundant number, since it is smaller than the sum of its proper divisors (234862967154).

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

201023231022 is a wasteful number, since it uses less digits than its factorization.

201023231022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8611912 (or 8611909 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 201023231022 its reverse (220132320102), we get a palindrome (421155551124).

The spelling of 201023231022 in words is "two hundred one billion, twenty-three million, two hundred thirty-one thousand, twenty-two".