20012021131223 has 32 divisors (see below), whose sum is σ = 22964859540480. Its totient is φ = 17272742175360.

The previous prime is 20012021131213. The next prime is 20012021131231. The reversal of 20012021131223 is 32213112021002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012021131223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012021131195 and 20012021131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012021131213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17633261 + ... + 18733817.

It is an arithmetic number, because the mean of its divisors is an integer number (717651860640).

Almost surely, 2^{20012021131223} is an apocalyptic number.

20012021131223 is a deficient number, since it is larger than the sum of its proper divisors (2952838409257).

20012021131223 is a wasteful number, since it uses less digits than its factorization.

20012021131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101687.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20012021131223 its reverse (32213112021002), we get a palindrome (52225133152225).

The spelling of 20012021131223 in words is "twenty trillion, twelve billion, twenty-one million, one hundred thirty-one thousand, two hundred twenty-three".