212110011811 has 2 divisors, whose sum is σ = 212110011812. Its totient is φ = 212110011810.

The previous prime is 212110011803. The next prime is 212110011829. The reversal of 212110011811 is 118110011212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212110011811 - 2³ = 212110011803 is a prime.

It is a super-2 number, since 2×212110011811² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212110011871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106055005905 + 106055005906.

It is an arithmetic number, because the mean of its divisors is an integer number (106055005906).

Almost surely, 2^212110011811 is an apocalyptic number.

212110011811 is a deficient number, since it is larger than the sum of its proper divisors (1).

212110011811 is an equidigital number, since it uses as much as digits as its factorization.

212110011811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 19.

The spelling of 212110011811 in words is "two hundred twelve billion, one hundred ten million, eleven thousand, eight hundred eleven".