211420200457 has 2 divisors, whose sum is σ = 211420200458. Its totient is φ = 211420200456.

The previous prime is 211420200419. The next prime is 211420200461. The reversal of 211420200457 is 754002024112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208834376256 + 2585824201 = 456984^2 + 50851^2 .

It is a cyclic number.

It is not a de Polignac number, because 211420200457 - 2¹⁵ = 211420167689 is a prime.

It is a super-2 number, since 2×211420200457² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211420200557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105710100228 + 105710100229.

It is an arithmetic number, because the mean of its divisors is an integer number (105710100229).

Almost surely, 2^211420200457 is an apocalyptic number.

It is an amenable number.

211420200457 is a deficient number, since it is larger than the sum of its proper divisors (1).

211420200457 is an equidigital number, since it uses as much as digits as its factorization.

211420200457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 28.

Adding to 211420200457 its reverse (754002024112), we get a palindrome (965422224569).

The spelling of 211420200457 in words is "two hundred eleven billion, four hundred twenty million, two hundred thousand, four hundred fifty-seven".