421121551534 has 12 divisors (see below), whose sum is σ = 666678579264. Its totient is φ = 199478629332.

The previous prime is 421121551463. The next prime is 421121551561. The reversal of 421121551534 is 435155121124.

It is a super-2 number, since 2×421121551534² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421121551534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 291634702 + ... + 291636145.

It is an arithmetic number, because the mean of its divisors is an integer number (55556548272).

Almost surely, 2^421121551534 is an apocalyptic number.

421121551534 is a deficient number, since it is larger than the sum of its proper divisors (245557027730).

421121551534 is a wasteful number, since it uses less digits than its factorization.

421121551534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583270887 (or 583270868 counting only the distinct ones).

The product of its digits is 24000, while the sum is 34.

Adding to 421121551534 its reverse (435155121124), we get a palindrome (856276672658).

The spelling of 421121551534 in words is "four hundred twenty-one billion, one hundred twenty-one million, five hundred fifty-one thousand, five hundred thirty-four".