20210111331121 has 8 divisors (see below), whose sum is σ = 21278217898080. Its totient is φ = 19142446413888.

The previous prime is 20210111331073. The next prime is 20210111331247. The reversal of 20210111331121 is 12113311101202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20210111331121 - 2³⁹ = 19660355517233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210111311121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110318491 + ... + 110501536.

It is an arithmetic number, because the mean of its divisors is an integer number (2659777237260).

Almost surely, 2^{20210111331121} is an apocalyptic number.

It is an amenable number.

20210111331121 is a deficient number, since it is larger than the sum of its proper divisors (1068106566959).

20210111331121 is a wasteful number, since it uses less digits than its factorization.

20210111331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220824863.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 20210111331121 its reverse (12113311101202), we get a palindrome (32323422432323).

The spelling of 20210111331121 in words is "twenty trillion, two hundred ten billion, one hundred eleven million, three hundred thirty-one thousand, one hundred twenty-one".