122121022020021 has 24 divisors (see below), whose sum is σ = 176740827494400. Its totient is φ = 81255443724576.

The previous prime is 122121022019929. The next prime is 122121022020031. The reversal of 122121022020021 is 120020220121221.

It is a happy number.

122121022020021 is a `hidden beast` number, since 1 + 2 + 212 + 10 + 220 + 200 + 21 = 666.

It is not a de Polignac number, because 122121022020021 - 2¹⁴ = 122121022003637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122121022019976 and 122121022020003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121022020031) 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, 9768060 + ... + 18429786.

It is an arithmetic number, because the mean of its divisors is an integer number (7364201145600).

Almost surely, 2^{122121022020021} is an apocalyptic number.

It is an amenable number.

122121022020021 is a deficient number, since it is larger than the sum of its proper divisors (54619805474379).

122121022020021 is a wasteful number, since it uses less digits than its factorization.

122121022020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8664785 (or 8664782 counting only the distinct ones).

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

Adding to 122121022020021 its reverse (120020220121221), we get a palindrome (242141242141242).

The spelling of 122121022020021 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, twenty-two million, twenty thousand, twenty-one".