1221110011201 has 8 divisors (see below), whose sum is σ = 1222221670560. Its totient is φ = 1219998501792.

The previous prime is 1221110011159. The next prime is 1221110011211. The reversal of 1221110011201 is 1021100111221.

It is a happy number.

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 1221110011201 - 2⁷ = 1221110011073 is a prime.

It is a super-2 number, since 2×1221110011201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221110011211) 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, 22070310 + ... + 22125568.

It is an arithmetic number, because the mean of its divisors is an integer number (152777708820).

Almost surely, 2^{1221110011201} is an apocalyptic number.

It is an amenable number.

1221110011201 is a deficient number, since it is larger than the sum of its proper divisors (1111659359).

1221110011201 is a wasteful number, since it uses less digits than its factorization.

1221110011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74975.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1221110011201 its reverse (1021100111221), we get a palindrome (2242210122422).

The spelling of 1221110011201 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, eleven thousand, two hundred one".