211013517855851 has 2 divisors, whose sum is σ = 211013517855852. Its totient is φ = 211013517855850.

The previous prime is 211013517855787. The next prime is 211013517855911. The reversal of 211013517855851 is 158558715310112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211013517855851 - 2⁶ = 211013517855787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211013517855793 and 211013517855802.

It is not a weakly prime, because it can be changed into another prime (211013517855451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105506758927925 + 105506758927926.

It is an arithmetic number, because the mean of its divisors is an integer number (105506758927926).

Almost surely, 2^{211013517855851} is an apocalyptic number.

211013517855851 is a deficient number, since it is larger than the sum of its proper divisors (1).

211013517855851 is an equidigital number, since it uses as much as digits as its factorization.

211013517855851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680000, while the sum is 53.

The spelling of 211013517855851 in words is "two hundred eleven trillion, thirteen billion, five hundred seventeen million, eight hundred fifty-five thousand, eight hundred fifty-one".