211200022112921 has 2 divisors, whose sum is σ = 211200022112922. Its totient is φ = 211200022112920.

The previous prime is 211200022112881. The next prime is 211200022112923. The reversal of 211200022112921 is 129211220002112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183741793309321 + 27458228803600 = 13555139^2 + 5240060^2 .

It is a cyclic number.

It is not a de Polignac number, because 211200022112921 - 2⁴² = 206801975601817 is a prime.

Together with 211200022112923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211200022112923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600011056460 + 105600011056461.

It is an arithmetic number, because the mean of its divisors is an integer number (105600011056461).

Almost surely, 2^{211200022112921} is an apocalyptic number.

It is an amenable number.

211200022112921 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200022112921 is an equidigital number, since it uses as much as digits as its factorization.

211200022112921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 211200022112921 in words is "two hundred eleven trillion, two hundred billion, twenty-two million, one hundred twelve thousand, nine hundred twenty-one".