1401111111 has 8 divisors (see below), whose sum is σ = 1868689024. Its totient is φ = 933803640.

The previous prime is 1401111073. The next prime is 1401111113. The reversal of 1401111111 is 1111111041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1401111111 - 2¹⁷ = 1400980039 is a prime.

It is a super-2 number, since 2×1401111111² = 3926224690735308642, which contains 22 as substring.

It is a Duffinian number.

1401111111 is a modest number, since divided by 111111 gives 1401 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55195 + ... + 76476.

It is an arithmetic number, because the mean of its divisors is an integer number (233586128).

Almost surely, 2^1401111111 is an apocalyptic number.

1401111111 is a deficient number, since it is larger than the sum of its proper divisors (467577913).

1401111111 is a wasteful number, since it uses less digits than its factorization.

1401111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135221.

The product of its (nonzero) digits is 4, while the sum is 12.

The square root of 1401111111 is about 37431.4187681953. The cubic root of 1401111111 is about 1118.9848132484.

Adding to 1401111111 its reverse (1111111041), we get a palindrome (2512222152).

The spelling of 1401111111 in words is "one billion, four hundred one million, one hundred eleven thousand, one hundred eleven".