1221110001201 has 32 divisors (see below), whose sum is σ = 1695747715200. Its totient is φ = 780945292800.

The previous prime is 1221110001197. The next prime is 1221110001253. The reversal of 1221110001201 is 1021000111221.

It is not a de Polignac number, because 1221110001201 - 2² = 1221110001197 is a prime.

It is a super-2 number, since 2×1221110001201² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221110001271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24727731 + ... + 24777063.

It is an arithmetic number, because the mean of its divisors is an integer number (52992116100).

Almost surely, 2^{1221110001201} is an apocalyptic number.

It is an amenable number.

1221110001201 is a deficient number, since it is larger than the sum of its proper divisors (474637713999).

1221110001201 is a wasteful number, since it uses less digits than its factorization.

1221110001201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52737.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1221110001201 its reverse (1021000111221), we get a palindrome (2242110112422).

The spelling of 1221110001201 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, one thousand, two hundred one".