210021120111149 has 2 divisors, whose sum is σ = 210021120111150. Its totient is φ = 210021120111148.

The previous prime is 210021120111109. The next prime is 210021120111251. The reversal of 210021120111149 is 941111021120012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170560335015625 + 39460785095524 = 13059875^2 + 6281782^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021120111149 - 2¹⁶ = 210021120045613 is a prime.

It is a super-2 number, since 2×210021120111149² (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 (210021120111109) 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 as a sum of consecutive naturals, namely, 105010560055574 + 105010560055575.

It is an arithmetic number, because the mean of its divisors is an integer number (105010560055575).

Almost surely, 2^{210021120111149} is an apocalyptic number.

It is an amenable number.

210021120111149 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021120111149 is an equidigital number, since it uses as much as digits as its factorization.

210021120111149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 210021120111149 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty million, one hundred eleven thousand, one hundred forty-nine".