211012221021011 has 4 divisors (see below), whose sum is σ = 215919481975032. Its totient is φ = 206104960066992.

The previous prime is 211012221020983. The next prime is 211012221021031. The reversal of 211012221021011 is 110120122210112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211012221021011 - 2²² = 211012216826707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211012221021031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2453630476946 + ... + 2453630477031.

It is an arithmetic number, because the mean of its divisors is an integer number (53979870493758).

Almost surely, 2^{211012221021011} is an apocalyptic number.

211012221021011 is a deficient number, since it is larger than the sum of its proper divisors (4907260954021).

211012221021011 is an equidigital number, since it uses as much as digits as its factorization.

211012221021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907260954020.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211012221021011 its reverse (110120122210112), we get a palindrome (321132343231123).

The spelling of 211012221021011 in words is "two hundred eleven trillion, twelve billion, two hundred twenty-one million, twenty-one thousand, eleven".