121121210103 has 64 divisors (see below), whose sum is σ = 170897126400. Its totient is φ = 76218734592.

The previous prime is 121121210101. The next prime is 121121210123. The reversal of 121121210103 is 301012121121.

It is not a de Polignac number, because 121121210103 - 2¹ = 121121210101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121210101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 359409951 + ... + 359410287.

It is an arithmetic number, because the mean of its divisors is an integer number (2670267600).

Almost surely, 2^121121210103 is an apocalyptic number.

121121210103 is a deficient number, since it is larger than the sum of its proper divisors (49775916297).

121121210103 is a wasteful number, since it uses less digits than its factorization.

121121210103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121121210103 its reverse (301012121121), we get a palindrome (422133331224).

The spelling of 121121210103 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred ten thousand, one hundred three".