20122002022221 has 24 divisors (see below), whose sum is σ = 31901921060256. Its totient is φ = 12120335843040.

The previous prime is 20122002022193. The next prime is 20122002022259. The reversal of 20122002022221 is 12222020022102.

20122002022221 is a `hidden beast` number, since 20 + 1 + 220 + 0 + 202 + 2 + 221 = 666.

It is not a de Polignac number, because 20122002022221 - 2¹⁴ = 20122002005837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122002022194 and 20122002022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122002022121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 623457930 + ... + 623490203.

It is an arithmetic number, because the mean of its divisors is an integer number (1329246710844).

Almost surely, 2^{20122002022221} is an apocalyptic number.

It is an amenable number.

20122002022221 is a deficient number, since it is larger than the sum of its proper divisors (11779919038035).

20122002022221 is a wasteful number, since it uses less digits than its factorization.

20122002022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246948313 (or 1246948310 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20122002022221 its reverse (12222020022102), we get a palindrome (32344022044323).

The spelling of 20122002022221 in words is "twenty trillion, one hundred twenty-two billion, two million, twenty-two thousand, two hundred twenty-one".