122220120021021 has 12 divisors (see below), whose sum is σ = 192589280033280. Its totient is φ = 74072800012680.

The previous prime is 122220120020987. The next prime is 122220120021037. The reversal of 122220120021021 is 120120021022221.

It is a happy number.

122220120021021 is a `hidden beast` number, since 1 + 222 + 201 + 200 + 21 + 0 + 21 = 666.

It is not a de Polignac number, because 122220120021021 - 2²⁶ = 122220052912157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122220120020985 and 122220120021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122220120023021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617273333341 + ... + 617273333538.

It is an arithmetic number, because the mean of its divisors is an integer number (16049106669440).

Almost surely, 2^{122220120021021} is an apocalyptic number.

122220120021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122220120021021 is a deficient number, since it is larger than the sum of its proper divisors (70369160012259).

122220120021021 is a wasteful number, since it uses less digits than its factorization.

122220120021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234546666896 (or 1234546666893 counting only the distinct ones).

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

Adding to 122220120021021 its reverse (120120021022221), we get a palindrome (242340141043242).

It can be divided in two parts, 1222201200 and 21021, that added together give a palindrome (1222222221).

The spelling of 122220120021021 in words is "one hundred twenty-two trillion, two hundred twenty billion, one hundred twenty million, twenty-one thousand, twenty-one".