121000501525 has 24 divisors (see below), whose sum is σ = 154405172000. Its totient is φ = 93995069760.

The previous prime is 121000501459. The next prime is 121000501529. The reversal of 121000501525 is 525105000121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-121000501525 is a prime.

It is a super-2 number, since 2×121000501525² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121000501496 and 121000501505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000501529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330502 + ... + 592648.

Almost surely, 2^121000501525 is an apocalyptic number.

It is an amenable number.

121000501525 is a deficient number, since it is larger than the sum of its proper divisors (33404670475).

121000501525 is a wasteful number, since it uses less digits than its factorization.

121000501525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262693 (or 262688 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

Adding to 121000501525 its reverse (525105000121), we get a palindrome (646105501646).

The spelling of 121000501525 in words is "one hundred twenty-one billion, five hundred one thousand, five hundred twenty-five".