211121001893 has 2 divisors, whose sum is σ = 211121001894. Its totient is φ = 211121001892.

The previous prime is 211121001857. The next prime is 211121001911. The reversal of 211121001893 is 398100121112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134573052964 + 76547948929 = 366842^2 + 276673^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121001893 - 2⁶ = 211121001829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211121001493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560500946 + 105560500947.

It is an arithmetic number, because the mean of its divisors is an integer number (105560500947).

Almost surely, 2^211121001893 is an apocalyptic number.

It is an amenable number.

211121001893 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121001893 is an equidigital number, since it uses as much as digits as its factorization.

211121001893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 211121001893 in words is "two hundred eleven billion, one hundred twenty-one million, one thousand, eight hundred ninety-three".