202121101120111 has 2 divisors, whose sum is σ = 202121101120112. Its totient is φ = 202121101120110.

The previous prime is 202121101120097. The next prime is 202121101120123. The reversal of 202121101120111 is 111021101121202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202121101120111 is a prime.

It is a super-2 number, since 2×202121101120111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202121101120151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060550560055 + 101060550560056.

It is an arithmetic number, because the mean of its divisors is an integer number (101060550560056).

Almost surely, 2^{202121101120111} is an apocalyptic number.

202121101120111 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121101120111 is an equidigital number, since it uses as much as digits as its factorization.

202121101120111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 202121101120111 its reverse (111021101121202), we get a palindrome (313142202241313).

The spelling of 202121101120111 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred one million, one hundred twenty thousand, one hundred eleven".