20213122301231 has 4 divisors (see below), whose sum is σ = 20214672757032. Its totient is φ = 20211571845432.

The previous prime is 20213122301191. The next prime is 20213122301243. The reversal of 20213122301231 is 13210322131202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20213122301231 - 2⁶ = 20213122301167 is a prime.

It is a super-2 number, since 2×20213122301231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213122301197 and 20213122301206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213122301831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775208345 + ... + 775234418.

It is an arithmetic number, because the mean of its divisors is an integer number (5053668189258).

Almost surely, 2^{20213122301231} is an apocalyptic number.

20213122301231 is a deficient number, since it is larger than the sum of its proper divisors (1550455801).

20213122301231 is a wasteful number, since it uses less digits than its factorization.

20213122301231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550455800.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20213122301231 its reverse (13210322131202), we get a palindrome (33423444432433).

The spelling of 20213122301231 in words is "twenty trillion, two hundred thirteen billion, one hundred twenty-two million, three hundred one thousand, two hundred thirty-one".