521144052121 has 8 divisors (see below), whose sum is σ = 649738039104. Its totient is φ = 406086274320.

The previous prime is 521144052113. The next prime is 521144052139. The reversal of 521144052121 is 121250441125.

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 521144052121 - 2³ = 521144052113 is a prime.

It is a super-2 number, since 2×521144052121² (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 521144052121.

It is not an unprimeable number, because it can be changed into a prime (521144052421) 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, 3384052210 + ... + 3384052363.

It is an arithmetic number, because the mean of its divisors is an integer number (81217254888).

Almost surely, 2^521144052121 is an apocalyptic number.

It is an amenable number.

521144052121 is a deficient number, since it is larger than the sum of its proper divisors (128593986983).

521144052121 is a wasteful number, since it uses less digits than its factorization.

521144052121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768104591.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 521144052121 its reverse (121250441125), we get a palindrome (642394493246).

The spelling of 521144052121 in words is "five hundred twenty-one billion, one hundred forty-four million, fifty-two thousand, one hundred twenty-one".