20020202112121 has 4 divisors (see below), whose sum is σ = 20065806217600. Its totient is φ = 19974598006644.

The previous prime is 20020202112103. The next prime is 20020202112143. The reversal of 20020202112121 is 12121120202002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20020202112121 - 2¹⁹ = 20020201587833 is a prime.

It is a super-2 number, since 2×20020202112121² (a number of 27 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 = 20020202112095 and 20020202112104.

It is not an unprimeable number, because it can be changed into a prime (20020202112151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22802052081 + ... + 22802052958.

It is an arithmetic number, because the mean of its divisors is an integer number (5016451554400).

Almost surely, 2^{20020202112121} is an apocalyptic number.

It is an amenable number.

20020202112121 is a deficient number, since it is larger than the sum of its proper divisors (45604105479).

20020202112121 is an equidigital number, since it uses as much as digits as its factorization.

20020202112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45604105478.

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

Adding to 20020202112121 its reverse (12121120202002), we get a palindrome (32141322314123).

The spelling of 20020202112121 in words is "twenty trillion, twenty billion, two hundred two million, one hundred twelve thousand, one hundred twenty-one".