4001215012243 has 4 divisors (see below), whose sum is σ = 4001241807160. Its totient is φ = 4001188217328.

The previous prime is 4001215012237. The next prime is 4001215012297. The reversal of 4001215012243 is 3422105121004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4001215012243 is a prime.

It is a super-3 number, since 3×4001215012243³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001215012043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13172205 + ... + 13472542.

It is an arithmetic number, because the mean of its divisors is an integer number (1000310451790).

Almost surely, 2^{4001215012243} is an apocalyptic number.

4001215012243 is a deficient number, since it is larger than the sum of its proper divisors (26794917).

4001215012243 is a wasteful number, since it uses less digits than its factorization.

4001215012243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26794916.

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 4001215012243 in words is "four trillion, one billion, two hundred fifteen million, twelve thousand, two hundred forty-three".