121521010103 has 8 divisors (see below), whose sum is σ = 128054564400. Its totient is φ = 115001227008.

The previous prime is 121521010057. The next prime is 121521010109. The reversal of 121521010103 is 301010125121.

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 121521010103 - 2¹⁰ = 121521009079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121521010109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3424676 + ... + 3459977.

It is an arithmetic number, because the mean of its divisors is an integer number (16006820550).

Almost surely, 2^121521010103 is an apocalyptic number.

121521010103 is a deficient number, since it is larger than the sum of its proper divisors (6533554297).

121521010103 is an equidigital number, since it uses as much as digits as its factorization.

121521010103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6885601.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 121521010103 its reverse (301010125121), we get a palindrome (422531135224).

The spelling of 121521010103 in words is "one hundred twenty-one billion, five hundred twenty-one million, ten thousand, one hundred three".