421504352011 has 4 divisors (see below), whose sum is σ = 435101266624. Its totient is φ = 407907437400.

The previous prime is 421504351973. The next prime is 421504352023. The reversal of 421504352011 is 110253405124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421504352011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421504352051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6798457260 + ... + 6798457321.

It is an arithmetic number, because the mean of its divisors is an integer number (108775316656).

Almost surely, 2^421504352011 is an apocalyptic number.

421504352011 is a deficient number, since it is larger than the sum of its proper divisors (13596914613).

421504352011 is a wasteful number, since it uses less digits than its factorization.

421504352011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13596914612.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 421504352011 its reverse (110253405124), we get a palindrome (531757757135).

The spelling of 421504352011 in words is "four hundred twenty-one billion, five hundred four million, three hundred fifty-two thousand, eleven".