1221112020201 has 8 divisors (see below), whose sum is σ = 1672153397184. Its totient is φ = 792072661680.

The previous prime is 1221112020181. The next prime is 1221112020217. The reversal of 1221112020201 is 1020202111221.

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

It is not a de Polignac number, because 1221112020201 - 2⁵ = 1221112020169 is a prime.

It is a super-2 number, since 2×1221112020201² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221112020251) 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, 5500504485 + ... + 5500504706.

It is an arithmetic number, because the mean of its divisors is an integer number (209019174648).

Almost surely, 2^{1221112020201} is an apocalyptic number.

It is an amenable number.

1221112020201 is a deficient number, since it is larger than the sum of its proper divisors (451041376983).

1221112020201 is a wasteful number, since it uses less digits than its factorization.

1221112020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11001009231.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221112020201 its reverse (1020202111221), we get a palindrome (2241314131422).

The spelling of 1221112020201 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, twenty thousand, two hundred one".