22001221021023 has 48 divisors (see below), whose sum is σ = 33919571764416. Its totient is φ = 13711870149120.

The previous prime is 22001221021009. The next prime is 22001221021051. The reversal of 22001221021023 is 32012012210022.

22001221021023 is a `hidden beast` number, since 220 + 0 + 1 + 2 + 210 + 210 + 23 = 666.

It is not a de Polignac number, because 22001221021023 - 2²⁴ = 22001204243807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22001221020987 and 22001221021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001221021723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3566590 + ... + 7531467.

It is an arithmetic number, because the mean of its divisors is an integer number (706657745092).

Almost surely, 2^{22001221021023} is an apocalyptic number.

22001221021023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

22001221021023 is a deficient number, since it is larger than the sum of its proper divisors (11918350743393).

22001221021023 is a wasteful number, since it uses less digits than its factorization.

22001221021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11098304 (or 11098301 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22001221021023 its reverse (32012012210022), we get a palindrome (54013233231045).

The spelling of 22001221021023 in words is "twenty-two trillion, one billion, two hundred twenty-one million, twenty-one thousand, twenty-three".