11020111211221 has 8 divisors (see below), whose sum is σ = 12594600736704. Its totient is φ = 9445668666720.

The previous prime is 11020111211189. The next prime is 11020111211243. The reversal of 11020111211221 is 12211211102011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11020111211221 - 2⁵ = 11020111211189 is a prime.

It is a super-2 number, since 2×11020111211221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11020111211195 and 11020111211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020111211251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11241160 + ... + 12182113.

It is an arithmetic number, because the mean of its divisors is an integer number (1574325092088).

Almost surely, 2^{11020111211221} is an apocalyptic number.

It is an amenable number.

11020111211221 is a deficient number, since it is larger than the sum of its proper divisors (1574489525483).

11020111211221 is an equidigital number, since it uses as much as digits as its factorization.

11020111211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23490491.

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

Adding to 11020111211221 its reverse (12211211102011), we get a palindrome (23231322313232).

The spelling of 11020111211221 in words is "eleven trillion, twenty billion, one hundred eleven million, two hundred eleven thousand, two hundred twenty-one".