5121215100 has 216 divisors, whose sum is σ = 16532504352. Its totient is φ = 1325376000.

The previous prime is 5121215089. The next prime is 5121215111. The reversal of 5121215100 is 15121215.

5121215100 is a `hidden beast` number, since 512 + 1 + 2 + 151 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (5121215089) and next prime (5121215111).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4817169 + ... + 4818231.

It is an arithmetic number, because the mean of its divisors is an integer number (76539372).

Almost surely, 2^5121215100 is an apocalyptic number.

5121215100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5121215100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8266252176).

5121215100 is an abundant number, since it is smaller than the sum of its proper divisors (11411289252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5121215100 is a wasteful number, since it uses less digits than its factorization.

5121215100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 5121215100 is about 71562.6655456600. The cubic root of 5121215100 is about 1723.6840877821.

Adding to 5121215100 its reverse (15121215), we get a palindrome (5136336315).

The spelling of 5121215100 in words is "five billion, one hundred twenty-one million, two hundred fifteen thousand, one hundred".