7115121520 has 320 divisors, whose sum is σ = 20248704000. Its totient is φ = 2296332288.

The previous prime is 7115121499. The next prime is 7115121521. The reversal of 7115121520 is 251215117.

It is a super-2 number, since 2×7115121520² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7115121521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19819101 + ... + 19819459.

It is an arithmetic number, because the mean of its divisors is an integer number (63277200).

Almost surely, 2^7115121520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7115121520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10124352000).

7115121520 is an abundant number, since it is smaller than the sum of its proper divisors (13133582480).

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

7115121520 is a wasteful number, since it uses less digits than its factorization.

7115121520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 25.

The square root of 7115121520 is about 84351.1797190768. The cubic root of 7115121520 is about 1923.3608597961.

Adding to 7115121520 its reverse (251215117), we get a palindrome (7366336637).

The spelling of 7115121520 in words is "seven billion, one hundred fifteen million, one hundred twenty-one thousand, five hundred twenty".