75052121131 has 8 divisors (see below), whose sum is σ = 81187809920. Its totient is φ = 68968210752.

The previous prime is 75052121117. The next prime is 75052121161. The reversal of 75052121131 is 13112125057.

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

It is a cyclic number.

It is not a de Polignac number, because 75052121131 - 2¹³ = 75052112939 is a prime.

It is a super-2 number, since 2×75052121131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75052121131.

It is not an unprimeable number, because it can be changed into a prime (75052121161) 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, 12941586 + ... + 12947383.

It is an arithmetic number, because the mean of its divisors is an integer number (10148476240).

Almost surely, 2^75052121131 is an apocalyptic number.

75052121131 is a deficient number, since it is larger than the sum of its proper divisors (6135688789).

75052121131 is a wasteful number, since it uses less digits than its factorization.

75052121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25889205.

The product of its (nonzero) digits is 2100, while the sum is 28.

Adding to 75052121131 its reverse (13112125057), we get a palindrome (88164246188).

The spelling of 75052121131 in words is "seventy-five billion, fifty-two million, one hundred twenty-one thousand, one hundred thirty-one".