121231002011203 has 4 divisors (see below), whose sum is σ = 138549716584240. Its totient is φ = 103912287438168.

The previous prime is 121231002011177. The next prime is 121231002011221. The reversal of 121231002011203 is 302110200132121.

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

It is a cyclic number.

It is not a de Polignac number, because 121231002011203 - 2²⁵ = 121230968456771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121231002011233) 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, 8659357286508 + ... + 8659357286521.

It is an arithmetic number, because the mean of its divisors is an integer number (34637429146060).

Almost surely, 2^{121231002011203} is an apocalyptic number.

121231002011203 is a deficient number, since it is larger than the sum of its proper divisors (17318714573037).

121231002011203 is an equidigital number, since it uses as much as digits as its factorization.

121231002011203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17318714573036.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121231002011203 its reverse (302110200132121), we get a palindrome (423341202143324).

The spelling of 121231002011203 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, two million, eleven thousand, two hundred three".