421111101111125 has 64 divisors (see below), whose sum is σ = 541090720235520. Its totient is φ = 327012021504000.

The previous prime is 421111101111089. The next prime is 421111101111137. The reversal of 421111101111125 is 521111101111124.

It is not a de Polignac number, because 421111101111125 - 2¹⁸ = 421111100848981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421111101111125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 827038364 + ... + 827547386.

It is an arithmetic number, because the mean of its divisors is an integer number (8454542503680).

Almost surely, 2^{421111101111125} is an apocalyptic number.

It is an amenable number.

421111101111125 is a deficient number, since it is larger than the sum of its proper divisors (119979619124395).

421111101111125 is a wasteful number, since it uses less digits than its factorization.

421111101111125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509895 (or 509885 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 23.

Adding to 421111101111125 its reverse (521111101111124), we get a palindrome (942222202222249).

Subtracting 421111101111125 from its reverse (521111101111124), we obtain a palindrome (99999999999999).

The spelling of 421111101111125 in words is "four hundred twenty-one trillion, one hundred eleven billion, one hundred one million, one hundred eleven thousand, one hundred twenty-five".