20202102122121 has 64 divisors (see below), whose sum is σ = 30337474752000. Its totient is φ = 13285393293312.

The previous prime is 20202102122119. The next prime is 20202102122123. The reversal of 20202102122121 is 12122120120202.

It is a happy number.

20202102122121 is a `hidden beast` number, since 202 + 0 + 210 + 212 + 21 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (20202102122119) and next prime (20202102122123).

It is not a de Polignac number, because 20202102122121 - 2¹ = 20202102122119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202102122094 and 20202102122103.

It is not an unprimeable number, because it can be changed into a prime (20202102122123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 765420901 + ... + 765447293.

It is an arithmetic number, because the mean of its divisors is an integer number (474023043000).

Almost surely, 2^{20202102122121} is an apocalyptic number.

It is an amenable number.

20202102122121 is a deficient number, since it is larger than the sum of its proper divisors (10135372629879).

20202102122121 is a wasteful number, since it uses less digits than its factorization.

20202102122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27567 (or 27561 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20202102122121 its reverse (12122120120202), we get a palindrome (32324222242323).

The spelling of 20202102122121 in words is "twenty trillion, two hundred two billion, one hundred two million, one hundred twenty-two thousand, one hundred twenty-one".