211213102202857 has 2 divisors, whose sum is σ = 211213102202858. Its totient is φ = 211213102202856.

The previous prime is 211213102202807. The next prime is 211213102202929. The reversal of 211213102202857 is 758202201312112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182239632147456 + 28973470055401 = 13499616^2 + 5382701^2 .

It is a cyclic number.

It is not a de Polignac number, because 211213102202857 - 2³¹ = 211210954719209 is a prime.

It is a super-2 number, since 2×211213102202857² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211213102202807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606551101428 + 105606551101429.

It is an arithmetic number, because the mean of its divisors is an integer number (105606551101429).

Almost surely, 2^{211213102202857} is an apocalyptic number.

It is an amenable number.

211213102202857 is a deficient number, since it is larger than the sum of its proper divisors (1).

211213102202857 is an equidigital number, since it uses as much as digits as its factorization.

211213102202857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

Adding to 211213102202857 its reverse (758202201312112), we get a palindrome (969415303514969).

The spelling of 211213102202857 in words is "two hundred eleven trillion, two hundred thirteen billion, one hundred two million, two hundred two thousand, eight hundred fifty-seven".