1420123111 has 16 divisors (see below), whose sum is σ = 1574391168. Its totient is φ = 1270180000.

The previous prime is 1420123091. The next prime is 1420123121. The reversal of 1420123111 is 1113210241.

It is a cyclic number.

It is not a de Polignac number, because 1420123111 - 2⁵ = 1420123079 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 (1420123121) 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, 226065 + ... + 232261.

It is an arithmetic number, because the mean of its divisors is an integer number (98399448).

Almost surely, 2^1420123111 is an apocalyptic number.

1420123111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1420123111 is a deficient number, since it is larger than the sum of its proper divisors (154268057).

1420123111 is a wasteful number, since it uses less digits than its factorization.

1420123111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6542.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1420123111 is about 37684.5208407909. The cubic root of 1420123111 is about 1124.0233462200.

Adding to 1420123111 its reverse (1113210241), we get a palindrome (2533333352).

The spelling of 1420123111 in words is "one billion, four hundred twenty million, one hundred twenty-three thousand, one hundred eleven".