20202121012211 has 4 divisors (see below), whose sum is σ = 20390925881592. Its totient is φ = 20013316142832.

The previous prime is 20202121012207. The next prime is 20202121012223. The reversal of 20202121012211 is 11221012120202.

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

It is a cyclic number.

It is not a de Polignac number, because 20202121012211 - 2² = 20202121012207 is a prime.

It is a super-2 number, since 2×20202121012211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20202121012211.

It is not an unprimeable number, because it can be changed into a prime (20202121012511) 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, 94402434530 + ... + 94402434743.

It is an arithmetic number, because the mean of its divisors is an integer number (5097731470398).

Almost surely, 2^{20202121012211} is an apocalyptic number.

20202121012211 is a deficient number, since it is larger than the sum of its proper divisors (188804869381).

20202121012211 is a wasteful number, since it uses less digits than its factorization.

20202121012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188804869380.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20202121012211 its reverse (11221012120202), we get a palindrome (31423133132413).

The spelling of 20202121012211 in words is "twenty trillion, two hundred two billion, one hundred twenty-one million, twelve thousand, two hundred eleven".