20021011121223 has 48 divisors (see below), whose sum is σ = 34492805268480. Its totient is φ = 10941490276992.

The previous prime is 20021011121219. The next prime is 20021011121233. The reversal of 20021011121223 is 32212111012002.

20021011121223 is a `hidden beast` number, since 200 + 210 + 1 + 11 + 21 + 223 = 666.

It is not a de Polignac number, because 20021011121223 - 2² = 20021011121219 is a prime.

It is a super-2 number, since 2×20021011121223² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20021011121196 and 20021011121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021011121233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8466790 + ... + 10570172.

It is an arithmetic number, because the mean of its divisors is an integer number (718600109760).

Almost surely, 2^{20021011121223} is an apocalyptic number.

20021011121223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20021011121223 is a deficient number, since it is larger than the sum of its proper divisors (14471794147257).

20021011121223 is a wasteful number, since it uses less digits than its factorization.

20021011121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109988 (or 2109985 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20021011121223 its reverse (32212111012002), we get a palindrome (52233122133225).

The spelling of 20021011121223 in words is "twenty trillion, twenty-one billion, eleven million, one hundred twenty-one thousand, two hundred twenty-three".