221002211211011 has 4 divisors (see below), whose sum is σ = 221044736175072. Its totient is φ = 220959686246952.

The previous prime is 221002211211007. The next prime is 221002211211031. The reversal of 221002211211011 is 110112112200122.

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 221002211211011 - 2² = 221002211211007 is a prime.

It is a super-2 number, since 2×221002211211011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221002211211031) 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, 21262474235 + ... + 21262484628.

It is an arithmetic number, because the mean of its divisors is an integer number (55261184043768).

Almost surely, 2^{221002211211011} is an apocalyptic number.

221002211211011 is a deficient number, since it is larger than the sum of its proper divisors (42524964061).

221002211211011 is an equidigital number, since it uses as much as digits as its factorization.

221002211211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42524964060.

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

Adding to 221002211211011 its reverse (110112112200122), we get a palindrome (331114323411133).

The spelling of 221002211211011 in words is "two hundred twenty-one trillion, two billion, two hundred eleven million, two hundred eleven thousand, eleven".