420123111 has 8 divisors (see below), whose sum is σ = 560478720. Its totient is φ = 279924792.

The previous prime is 420123101. The next prime is 420123113. The reversal of 420123111 is 111321024.

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

It is not a de Polignac number, because 420123111 - 2¹¹ = 420121063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420123113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32941 + ... + 43878.

It is an arithmetic number, because the mean of its divisors is an integer number (70059840).

Almost surely, 2^420123111 is an apocalyptic number.

420123111 is a deficient number, since it is larger than the sum of its proper divisors (140355609).

420123111 is a wasteful number, since it uses less digits than its factorization.

420123111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78645.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 420123111 is about 20496.9049126935. The cubic root of 420123111 is about 748.9604032060.

Adding to 420123111 its reverse (111321024), we get a palindrome (531444135).

It can be divided in two parts, 420123 and 111, that multiplied together give a triangular number (46633653 = T₉₆₅₇).

The spelling of 420123111 in words is "four hundred twenty million, one hundred twenty-three thousand, one hundred eleven".