22101221011 has 4 divisors (see below), whose sum is σ = 22640275224. Its totient is φ = 21562166800.

The previous prime is 22101220949. The next prime is 22101221099. The reversal of 22101221011 is 11012210122.

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 22101221011 - 2²⁷ = 21967003283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22101220982 and 22101221000.

It is not an unprimeable number, because it can be changed into a prime (22101221411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269527045 + ... + 269527126.

It is an arithmetic number, because the mean of its divisors is an integer number (5660068806).

Almost surely, 2^22101221011 is an apocalyptic number.

22101221011 is a deficient number, since it is larger than the sum of its proper divisors (539054213).

22101221011 is an equidigital number, since it uses as much as digits as its factorization.

22101221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539054212.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22101221011 its reverse (11012210122), we get a palindrome (33113431133).

It can be divided in two parts, 2210 and 1221011, that added together give a palindrome (1223221).

The spelling of 22101221011 in words is "twenty-two billion, one hundred one million, two hundred twenty-one thousand, eleven".