20202121122111 has 24 divisors (see below), whose sum is σ = 29242637424000. Its totient is φ = 13439561297472.

The previous prime is 20202121122103. The next prime is 20202121122121. The reversal of 20202121122111 is 11122112120202.

20202121122111 is a `hidden beast` number, since 20 + 202 + 1 + 211 + 221 + 11 = 666.

It is not a de Polignac number, because 20202121122111 - 2³ = 20202121122103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202121122101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236325085 + ... + 236410553.

It is an arithmetic number, because the mean of its divisors is an integer number (1218443226000).

Almost surely, 2^{20202121122111} is an apocalyptic number.

20202121122111 is a deficient number, since it is larger than the sum of its proper divisors (9040516301889).

20202121122111 is a wasteful number, since it uses less digits than its factorization.

20202121122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140783 (or 140780 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20202121122111 its reverse (11122112120202), we get a palindrome (31324233242313).

The spelling of 20202121122111 in words is "twenty trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".