1212101001001 has 8 divisors (see below), whose sum is σ = 1322300083104. Its totient is φ = 1101903265920.

The previous prime is 1212101000969. The next prime is 1212101001043. The reversal of 1212101001001 is 1001001012121.

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 1212101001001 - 2⁵ = 1212101000969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212101001061) 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 7 ways as a sum of consecutive naturals, for example, 2884366 + ... + 3277768.

It is an arithmetic number, because the mean of its divisors is an integer number (165287510388).

Almost surely, 2^{1212101001001} is an apocalyptic number.

1212101001001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212101001001 is a deficient number, since it is larger than the sum of its proper divisors (110199082103).

1212101001001 is a wasteful number, since it uses less digits than its factorization.

1212101001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673511.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1212101001001 its reverse (1001001012121), we get a palindrome (2213102013122).

It can be divided in two parts, 121210 and 1001001, that added together give a palindrome (1122211).

The spelling of 1212101001001 in words is "one trillion, two hundred twelve billion, one hundred one million, one thousand, one".