420110111211521 has 16 divisors (see below), whose sum is σ = 424272972816000. Its totient is φ = 415951653043968.

The previous prime is 420110111211473. The next prime is 420110111211563. The reversal of 420110111211521 is 125112111011024.

It is a cyclic number.

It is not a de Polignac number, because 420110111211521 - 2⁶ = 420110111211457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420110111211421) 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, 5583637220 + ... + 5583712458.

It is an arithmetic number, because the mean of its divisors is an integer number (26517060801000).

Almost surely, 2^{420110111211521} is an apocalyptic number.

It is an amenable number.

420110111211521 is a deficient number, since it is larger than the sum of its proper divisors (4162861604479).

420110111211521 is a wasteful number, since it uses less digits than its factorization.

420110111211521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103768.

The product of its (nonzero) digits is 160, while the sum is 23.

Adding to 420110111211521 its reverse (125112111011024), we get a palindrome (545222222222545).

The spelling of 420110111211521 in words is "four hundred twenty trillion, one hundred ten billion, one hundred eleven million, two hundred eleven thousand, five hundred twenty-one".