121525545203 has 4 divisors (see below), whose sum is σ = 121725752640. Its totient is φ = 121325337768.

The previous prime is 121525545181. The next prime is 121525545221. The reversal of 121525545203 is 302545525121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302545525121 = 7 ⋅43220789303.

It is a cyclic number.

It is not a de Polignac number, because 121525545203 - 2¹² = 121525541107 is a prime.

It is a super-2 number, since 2×121525545203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121525545223) 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, 100102808 + ... + 100104021.

It is an arithmetic number, because the mean of its divisors is an integer number (30431438160).

Almost surely, 2^121525545203 is an apocalyptic number.

121525545203 is a deficient number, since it is larger than the sum of its proper divisors (200207437).

121525545203 is an equidigital number, since it uses as much as digits as its factorization.

121525545203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200207436.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 121525545203 in words is "one hundred twenty-one billion, five hundred twenty-five million, five hundred forty-five thousand, two hundred three".