121121221213103 has 4 divisors (see below), whose sum is σ = 122253195243240. Its totient is φ = 119989247182968.

The previous prime is 121121221213087. The next prime is 121121221213117. The reversal of 121121221213103 is 301312122121121.

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 121121221213103 - 2⁴ = 121121221213087 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 (121121221213193) 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, 565987014908 + ... + 565987015121.

It is an arithmetic number, because the mean of its divisors is an integer number (30563298810810).

Almost surely, 2^{121121221213103} is an apocalyptic number.

121121221213103 is a deficient number, since it is larger than the sum of its proper divisors (1131974030137).

121121221213103 is a wasteful number, since it uses less digits than its factorization.

121121221213103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131974030136.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 121121221213103 its reverse (301312122121121), we get a palindrome (422433343334224).

The spelling of 121121221213103 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred thirteen thousand, one hundred three".