20213129011223 has 2 divisors, whose sum is σ = 20213129011224. Its totient is φ = 20213129011222.

The previous prime is 20213129011199. The next prime is 20213129011241. The reversal of 20213129011223 is 32211092131202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20213129011223 - 2²⁰ = 20213127962647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213129011423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106564505611 + 10106564505612.

It is an arithmetic number, because the mean of its divisors is an integer number (10106564505612).

Almost surely, 2^{20213129011223} is an apocalyptic number.

20213129011223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213129011223 is an equidigital number, since it uses as much as digits as its factorization.

20213129011223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 20213129011223 in words is "twenty trillion, two hundred thirteen billion, one hundred twenty-nine million, eleven thousand, two hundred twenty-three".