6941221111 has 4 divisors (see below), whose sum is σ = 7572241224. Its totient is φ = 6310201000.

The previous prime is 6941221109. The next prime is 6941221139. The reversal of 6941221111 is 1111221496.

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

It is a cyclic number.

It is not a de Polignac number, because 6941221111 - 2¹ = 6941221109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6941221111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6941221211) 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, 315510040 + ... + 315510061.

It is an arithmetic number, because the mean of its divisors is an integer number (1893060306).

Almost surely, 2^6941221111 is an apocalyptic number.

6941221111 is a deficient number, since it is larger than the sum of its proper divisors (631020113).

6941221111 is a wasteful number, since it uses less digits than its factorization.

6941221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631020112.

The product of its digits is 864, while the sum is 28.

The square root of 6941221111 is about 83313.9910879319. The cubic root of 6941221111 is about 1907.5618415834.

The spelling of 6941221111 in words is "six billion, nine hundred forty-one million, two hundred twenty-one thousand, one hundred eleven".