211030021291 has 64 divisors (see below), whose sum is σ = 233376546816. Its totient is φ = 190298908800.

The previous prime is 211030021247. The next prime is 211030021327. The reversal of 211030021291 is 192120030112.

It is not a de Polignac number, because 211030021291 - 2¹¹ = 211030019243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211030021201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1000142176 + ... + 1000142386.

It is an arithmetic number, because the mean of its divisors is an integer number (3646508544).

Almost surely, 2^211030021291 is an apocalyptic number.

211030021291 is a deficient number, since it is larger than the sum of its proper divisors (22346525525).

211030021291 is a wasteful number, since it uses less digits than its factorization.

211030021291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 211030021291 in words is "two hundred eleven billion, thirty million, twenty-one thousand, two hundred ninety-one".