1212012111001 has 16 divisors (see below), whose sum is σ = 1294824061440. Its totient is φ = 1131968154240.

The previous prime is 1212012110999. The next prime is 1212012111019. The reversal of 1212012111001 is 1001112102121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1212012111001 - 2¹ = 1212012110999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212012111091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1740685 + ... + 2335381.

It is an arithmetic number, because the mean of its divisors is an integer number (80926503840).

Almost surely, 2^{1212012111001} is an apocalyptic number.

It is an amenable number.

1212012111001 is a deficient number, since it is larger than the sum of its proper divisors (82811950439).

1212012111001 is a wasteful number, since it uses less digits than its factorization.

1212012111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597024.

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

Adding to 1212012111001 its reverse (1001112102121), we get a palindrome (2213124213122).

The spelling of 1212012111001 in words is "one trillion, two hundred twelve billion, twelve million, one hundred eleven thousand, one".