211211099993 has 2 divisors, whose sum is σ = 211211099994. Its totient is φ = 211211099992.

The previous prime is 211211099987. The next prime is 211211099999. The reversal of 211211099993 is 399990112112.

It is a balanced prime because it is at equal distance from previous prime (211211099987) and next prime (211211099999).

It can be written as a sum of positive squares in only one way, i.e., 209826292624 + 1384807369 = 458068^2 + 37213^2 .

It is a cyclic number.

It is not a de Polignac number, because 211211099993 - 2¹⁴ = 211211083609 is a prime.

It is a super-2 number, since 2×211211099993² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211211099999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605549996 + 105605549997.

It is an arithmetic number, because the mean of its divisors is an integer number (105605549997).

Almost surely, 2^211211099993 is an apocalyptic number.

It is an amenable number.

211211099993 is a deficient number, since it is larger than the sum of its proper divisors (1).

211211099993 is an equidigital number, since it uses as much as digits as its factorization.

211211099993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 47.

The spelling of 211211099993 in words is "two hundred eleven billion, two hundred eleven million, ninety-nine thousand, nine hundred ninety-three".