20211123221020 has 48 divisors (see below), whose sum is σ = 42847436026080. Its totient is φ = 8007750844416.

The previous prime is 20211123221011. The next prime is 20211123221027. The reversal of 20211123221020 is 2012232111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211123221027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7191397 + ... + 9598876.

It is an arithmetic number, because the mean of its divisors is an integer number (892654917210).

Almost surely, 2^{20211123221020} is an apocalyptic number.

20211123221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211123221020 is an abundant number, since it is smaller than the sum of its proper divisors (22636312805060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20211123221020 is a wasteful number, since it uses less digits than its factorization.

20211123221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16790854 (or 16790852 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20211123221020 its reverse (2012232111202), we get a palindrome (22223355332222).

The spelling of 20211123221020 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-three million, two hundred twenty-one thousand, twenty".