3911247204421 has 4 divisors (see below), whose sum is σ = 3914194641472. Its totient is φ = 3908299767372.

The previous prime is 3911247204413. The next prime is 3911247204443. The reversal of 3911247204421 is 1244027421193.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3911247204421 - 2³ = 3911247204413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3911247204401) 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, 1473716535 + ... + 1473719188.

It is an arithmetic number, because the mean of its divisors is an integer number (978548660368).

Almost surely, 2^{3911247204421} is an apocalyptic number.

It is an amenable number.

3911247204421 is a deficient number, since it is larger than the sum of its proper divisors (2947437051).

3911247204421 is a wasteful number, since it uses less digits than its factorization.

3911247204421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947437050.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 3911247204421 in words is "three trillion, nine hundred eleven billion, two hundred forty-seven million, two hundred four thousand, four hundred twenty-one".