111020000001221 has 8 divisors (see below), whose sum is σ = 112008111522840. Its totient is φ = 110031987315712.

The previous prime is 111020000001151. The next prime is 111020000001259. The reversal of 111020000001221 is 122100000020111.

It can be written as a sum of positive squares in 4 ways, for example, as 9647925544321 + 101372074456900 = 3106111^2 + 10068370^2 .

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

It is not a de Polignac number, because 111020000001221 - 2²² = 111019995806917 is a prime.

It is a super-2 number, since 2×111020000001221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020000001271) 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, 22451570 + ... + 26946483.

It is an arithmetic number, because the mean of its divisors is an integer number (14001013940355).

Almost surely, 2^{111020000001221} is an apocalyptic number.

It is an amenable number.

111020000001221 is a deficient number, since it is larger than the sum of its proper divisors (988111521619).

111020000001221 is a wasteful number, since it uses less digits than its factorization.

111020000001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49418055.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111020000001221 its reverse (122100000020111), we get a palindrome (233120000021332).

The spelling of 111020000001221 in words is "one hundred eleven trillion, twenty billion, one thousand, two hundred twenty-one".