20202101112121 has 4 divisors (see below), whose sum is σ = 20290319894500. Its totient is φ = 20113882329744.

The previous prime is 20202101112041. The next prime is 20202101112139. The reversal of 20202101112121 is 12121110120202.

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 19240154049600 + 961947062521 = 4386360^2 + 980789^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202101112121 - 2⁹ = 20202101111609 is a prime.

It is a super-3 number, since 3×20202101112121³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202101112095 and 20202101112104.

It is not an unprimeable number, because it can be changed into a prime (20202101112421) 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, 44109390846 + ... + 44109391303.

It is an arithmetic number, because the mean of its divisors is an integer number (5072579973625).

Almost surely, 2^{20202101112121} is an apocalyptic number.

It is an amenable number.

20202101112121 is a deficient number, since it is larger than the sum of its proper divisors (88218782379).

20202101112121 is an equidigital number, since it uses as much as digits as its factorization.

20202101112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88218782378.

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

Adding to 20202101112121 its reverse (12121110120202), we get a palindrome (32323211232323).

The spelling of 20202101112121 in words is "twenty trillion, two hundred two billion, one hundred one million, one hundred twelve thousand, one hundred twenty-one".