21101221022023 has 8 divisors (see below), whose sum is σ = 21123367951536. Its totient is φ = 21079083849600.

The previous prime is 21101221021967. The next prime is 21101221022029. The reversal of 21101221022023 is 32022012210112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101221022023 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 (21101221022029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892340 + ... + 6766342.

It is an arithmetic number, because the mean of its divisors is an integer number (2640420993942).

Almost surely, 2^{21101221022023} is an apocalyptic number.

21101221022023 is a deficient number, since it is larger than the sum of its proper divisors (22146929513).

21101221022023 is a wasteful number, since it uses less digits than its factorization.

21101221022023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4878545.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21101221022023 its reverse (32022012210112), we get a palindrome (53123233232135).

The spelling of 21101221022023 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-one million, twenty-two thousand, twenty-three".