20211121031211 has 96 divisors (see below), whose sum is σ = 34899723383040. Its totient is φ = 11604466419120.

The previous prime is 20211121031207. The next prime is 20211121031219. The reversal of 20211121031211 is 11213012111202.

It is a happy number.

20211121031211 is a `hidden beast` number, since 2 + 0 + 211 + 1 + 210 + 31 + 211 = 666.

It is not a de Polignac number, because 20211121031211 - 2² = 20211121031207 is a prime.

It is a super-2 number, since 2×20211121031211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20211121031219) 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 95 ways as a sum of consecutive naturals, for example, 7520956 + ... + 9848198.

It is an arithmetic number, because the mean of its divisors is an integer number (363538785240).

Almost surely, 2^{20211121031211} is an apocalyptic number.

20211121031211 is a deficient number, since it is larger than the sum of its proper divisors (14688602351829).

20211121031211 is an equidigital number, since it uses as much as digits as its factorization.

20211121031211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327313 (or 2327276 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 20211121031211 its reverse (11213012111202), we get a palindrome (31424133142413).

The spelling of 20211121031211 in words is "twenty trillion, two hundred eleven billion, one hundred twenty-one million, thirty-one thousand, two hundred eleven".