21220120202023 has 2 divisors, whose sum is σ = 21220120202024. Its totient is φ = 21220120202022.

The previous prime is 21220120202003. The next prime is 21220120202119. The reversal of 21220120202023 is 32020202102212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220120202023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220120202003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610060101011 + 10610060101012.

It is an arithmetic number, because the mean of its divisors is an integer number (10610060101012).

Almost surely, 2^{21220120202023} is an apocalyptic number.

21220120202023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220120202023 is an equidigital number, since it uses as much as digits as its factorization.

21220120202023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21220120202023 its reverse (32020202102212), we get a palindrome (53240322304235).

The spelling of 21220120202023 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty million, two hundred two thousand, twenty-three".