20112220211021 has 8 divisors (see below), whose sum is σ = 20162690722944. Its totient is φ = 20061751268800.

The previous prime is 20112220211011. The next prime is 20112220211033. The reversal of 20112220211021 is 12011202221102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112220211021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112220211011) 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, 27802310 + ... + 28516536.

It is an arithmetic number, because the mean of its divisors is an integer number (2520336340368).

Almost surely, 2^{20112220211021} is an apocalyptic number.

It is an amenable number.

20112220211021 is a deficient number, since it is larger than the sum of its proper divisors (50470511923).

20112220211021 is an equidigital number, since it uses as much as digits as its factorization.

20112220211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784851.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20112220211021 its reverse (12011202221102), we get a palindrome (32123422432123).

The spelling of 20112220211021 in words is "twenty trillion, one hundred twelve billion, two hundred twenty million, two hundred eleven thousand, twenty-one".