1001121212201 has 16 divisors (see below), whose sum is σ = 1116779227200. Its totient is φ = 889741483200.

The previous prime is 1001121212171. The next prime is 1001121212227. The reversal of 1001121212201 is 1022121211001.

It is a cyclic number.

It is not a de Polignac number, because 1001121212201 - 2⁶ = 1001121212137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001121214201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4143746 + ... + 4378683.

It is an arithmetic number, because the mean of its divisors is an integer number (69798701700).

Almost surely, 2^{1001121212201} is an apocalyptic number.

1001121212201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001121212201 is a deficient number, since it is larger than the sum of its proper divisors (115658014999).

1001121212201 is a wasteful number, since it uses less digits than its factorization.

1001121212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8522680.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1001121212201 its reverse (1022121211001), we get a palindrome (2023242423202).

It can be divided in two parts, 10011 and 21212201, that added together give a palindrome (21222212).

The spelling of 1001121212201 in words is "one trillion, one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred one".