121351525001 has 4 divisors (see below), whose sum is σ = 138687457152. Its totient is φ = 104015592852.

The previous prime is 121351524991. The next prime is 121351525007. The reversal of 121351525001 is 100525153121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121351525001 - 2¹⁰ = 121351523977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121351525007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8667966065 + ... + 8667966078.

It is an arithmetic number, because the mean of its divisors is an integer number (34671864288).

Almost surely, 2^121351525001 is an apocalyptic number.

It is an amenable number.

121351525001 is a deficient number, since it is larger than the sum of its proper divisors (17335932151).

121351525001 is an equidigital number, since it uses as much as digits as its factorization.

121351525001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17335932150.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 121351525001 its reverse (100525153121), we get a palindrome (221876678122).

It can be divided in two parts, 121 and 351525001, that multiplied together give a square (42534525121 = 206239²).

The spelling of 121351525001 in words is "one hundred twenty-one billion, three hundred fifty-one million, five hundred twenty-five thousand, one".