21122210102011 has 4 divisors (see below), whose sum is σ = 22040567062992. Its totient is φ = 20203853141032.

The previous prime is 21122210101987. The next prime is 21122210102087. The reversal of 21122210102011 is 11020101222112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122210102011 is a prime.

It is a super-2 number, since 2×21122210102011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122210102311) 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, 459178480456 + ... + 459178480501.

It is an arithmetic number, because the mean of its divisors is an integer number (5510141765748).

Almost surely, 2^{21122210102011} is an apocalyptic number.

21122210102011 is a deficient number, since it is larger than the sum of its proper divisors (918356960981).

21122210102011 is an equidigital number, since it uses as much as digits as its factorization.

21122210102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918356960980.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21122210102011 its reverse (11020101222112), we get a palindrome (32142311324123).

The spelling of 21122210102011 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred ten million, one hundred two thousand, eleven".