122121202013 has 4 divisors (see below), whose sum is σ = 122122426620. Its totient is φ = 122119977408.

The previous prime is 122121202001. The next prime is 122121202033. The reversal of 122121202013 is 310202121221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310202121221 = 9649 ⋅32148629.

It can be written as a sum of positive squares in 2 ways, for example, as 53667282244 + 68453919769 = 231662^2 + 261637^2 .

It is a cyclic number.

It is not a de Polignac number, because 122121202013 - 2⁴ = 122121201997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122121201982 and 122121202000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121202033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448028 + ... + 667061.

It is an arithmetic number, because the mean of its divisors is an integer number (30530606655).

Almost surely, 2^122121202013 is an apocalyptic number.

It is an amenable number.

122121202013 is a deficient number, since it is larger than the sum of its proper divisors (1224607).

122121202013 is a wasteful number, since it uses less digits than its factorization.

122121202013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224606.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 122121202013 its reverse (310202121221), we get a palindrome (432323323234).

The spelling of 122121202013 in words is "one hundred twenty-two billion, one hundred twenty-one million, two hundred two thousand, thirteen".