211940848381 has 2 divisors, whose sum is σ = 211940848382. Its totient is φ = 211940848380.

The previous prime is 211940848373. The next prime is 211940848409. The reversal of 211940848381 is 183848049112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152908371225 + 59032477156 = 391035^2 + 242966^2 .

It is a cyclic number.

It is not a de Polignac number, because 211940848381 - 2³ = 211940848373 is a prime.

It is a super-2 number, since 2×211940848381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211940845381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105970424190 + 105970424191.

It is an arithmetic number, because the mean of its divisors is an integer number (105970424191).

Almost surely, 2^211940848381 is an apocalyptic number.

It is an amenable number.

211940848381 is a deficient number, since it is larger than the sum of its proper divisors (1).

211940848381 is an equidigital number, since it uses as much as digits as its factorization.

211940848381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 49.

The spelling of 211940848381 in words is "two hundred eleven billion, nine hundred forty million, eight hundred forty-eight thousand, three hundred eighty-one".