20122002211221 has 24 divisors (see below), whose sum is σ = 30596411327040. Its totient is φ = 12707987400000.

The previous prime is 20122002211121. The next prime is 20122002211247. The reversal of 20122002211221 is 12211220022102.

It is a happy number.

20122002211221 is a `hidden beast` number, since 2 + 0 + 1 + 220 + 0 + 221 + 1 + 221 = 666.

It is not a de Polignac number, because 20122002211221 - 2¹⁹ = 20122001686933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122002211194 and 20122002211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122002211121) 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, 398521 + ... + 6356321.

It is an arithmetic number, because the mean of its divisors is an integer number (1274850471960).

Almost surely, 2^{20122002211221} is an apocalyptic number.

It is an amenable number.

20122002211221 is a deficient number, since it is larger than the sum of its proper divisors (10474409115819).

20122002211221 is a wasteful number, since it uses less digits than its factorization.

20122002211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5977577 (or 5977574 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20122002211221 its reverse (12211220022102), we get a palindrome (32333222233323).

The spelling of 20122002211221 in words is "twenty trillion, one hundred twenty-two billion, two million, two hundred eleven thousand, two hundred twenty-one".