20122020221 has 8 divisors (see below), whose sum is σ = 20650507584. Its totient is φ = 19595328480.

The previous prime is 20122020211. The next prime is 20122020263. The reversal of 20122020221 is 12202022102.

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-20122020221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122020196 and 20122020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122020211) 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, 426185 + ... + 471038.

It is an arithmetic number, because the mean of its divisors is an integer number (2581313448).

Almost surely, 2^20122020221 is an apocalyptic number.

It is an amenable number.

20122020221 is a deficient number, since it is larger than the sum of its proper divisors (528487363).

20122020221 is an equidigital number, since it uses as much as digits as its factorization.

20122020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897811.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20122020221 its reverse (12202022102), we get a palindrome (32324042323).

The spelling of 20122020221 in words is "twenty billion, one hundred twenty-two million, twenty thousand, two hundred twenty-one".