20020121102122 has 4 divisors (see below), whose sum is σ = 30030181653186. Its totient is φ = 10010060551060.

The previous prime is 20020121102119. The next prime is 20020121102129. The reversal of 20020121102122 is 22120112102002.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 17596086963361 + 2424034138761 = 4194769^2 + 1556931^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20020121102096 and 20020121102105.

It is not an unprimeable number, because it can be changed into a prime (20020121102129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005030275529 + ... + 5005030275532.

Almost surely, 2^{20020121102122} is an apocalyptic number.

20020121102122 is a deficient number, since it is larger than the sum of its proper divisors (10010060551064).

20020121102122 is a wasteful number, since it uses less digits than its factorization.

20020121102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010060551063.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20020121102122 its reverse (22120112102002), we get a palindrome (42140233204124).

The spelling of 20020121102122 in words is "twenty trillion, twenty billion, one hundred twenty-one million, one hundred two thousand, one hundred twenty-two".