4012121111001 has 16 divisors (see below), whose sum is σ = 5381366492160. Its totient is φ = 2658822603920.

The previous prime is 4012121110999. The next prime is 4012121111003. The reversal of 4012121111001 is 1001111212104.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4012121110999) and next prime (4012121111003).

It is a cyclic number.

It is not a de Polignac number, because 4012121111001 - 2¹ = 4012121110999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4012121111003) 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, 77836 + ... + 2833778.

It is an arithmetic number, because the mean of its divisors is an integer number (336335405760).

Almost surely, 2^{4012121111001} is an apocalyptic number.

It is an amenable number.

4012121111001 is a deficient number, since it is larger than the sum of its proper divisors (1369245381159).

4012121111001 is a wasteful number, since it uses less digits than its factorization.

4012121111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758836.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 4012121111001 its reverse (1001111212104), we get a palindrome (5013232323105).

The spelling of 4012121111001 in words is "four trillion, twelve billion, one hundred twenty-one million, one hundred eleven thousand, one".