122001112120021 has 4 divisors (see below), whose sum is σ = 122031696509100. Its totient is φ = 121970527730944.

The previous prime is 122001112119883. The next prime is 122001112120067. The reversal of 122001112120021 is 120021211100221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72590911200900 + 49410200919121 = 8520030^2 + 7029239^2 .

It is a cyclic number.

It is not a de Polignac number, because 122001112120021 - 2¹³ = 122001112111829 is a prime.

It is a super-2 number, since 2×122001112120021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122001112119977 and 122001112120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122001112120091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15292188556 + ... + 15292196533.

It is an arithmetic number, because the mean of its divisors is an integer number (30507924127275).

Almost surely, 2^{122001112120021} is an apocalyptic number.

It is an amenable number.

122001112120021 is a deficient number, since it is larger than the sum of its proper divisors (30584389079).

122001112120021 is an equidigital number, since it uses as much as digits as its factorization.

122001112120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30584389078.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 122001112120021 its reverse (120021211100221), we get a palindrome (242022323220242).

The spelling of 122001112120021 in words is "one hundred twenty-two trillion, one billion, one hundred twelve million, one hundred twenty thousand, twenty-one".