51103211421 has 8 divisors (see below), whose sum is σ = 70335602944. Its totient is φ = 32969813760.

The previous prime is 51103211413. The next prime is 51103211441. The reversal of 51103211421 is 12411230115.

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

It is not a de Polignac number, because 51103211421 - 2³ = 51103211413 is a prime.

It is a super-2 number, since 2×51103211421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51103211441) 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, 274748356 + ... + 274748541.

It is an arithmetic number, because the mean of its divisors is an integer number (8791950368).

Almost surely, 2^51103211421 is an apocalyptic number.

It is an amenable number.

51103211421 is a deficient number, since it is larger than the sum of its proper divisors (19232391523).

51103211421 is a wasteful number, since it uses less digits than its factorization.

51103211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549496931.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 51103211421 its reverse (12411230115), we get a palindrome (63514441536).

The spelling of 51103211421 in words is "fifty-one billion, one hundred three million, two hundred eleven thousand, four hundred twenty-one".