121312001112103 has 4 divisors (see below), whose sum is σ = 126586435943088. Its totient is φ = 116037566281120.

The previous prime is 121312001112079. The next prime is 121312001112121. The reversal of 121312001112103 is 301211100213121.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-121312001112103 is a prime.

It is a super-2 number, since 2×121312001112103² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312001112403) 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, 2637217415458 + ... + 2637217415503.

It is an arithmetic number, because the mean of its divisors is an integer number (31646608985772).

Almost surely, 2^{121312001112103} is an apocalyptic number.

121312001112103 is a deficient number, since it is larger than the sum of its proper divisors (5274434830985).

121312001112103 is an equidigital number, since it uses as much as digits as its factorization.

121312001112103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274434830984.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 121312001112103 its reverse (301211100213121), we get a palindrome (422523101325224).

The spelling of 121312001112103 in words is "one hundred twenty-one trillion, three hundred twelve billion, one million, one hundred twelve thousand, one hundred three".