121210110103 has 4 divisors (see below), whose sum is σ = 121243848768. Its totient is φ = 121176371440.

The previous prime is 121210110083. The next prime is 121210110113. The reversal of 121210110103 is 301011012121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301011012121 = 1489 ⋅202156489.

It is a cyclic number.

It is not a de Polignac number, because 121210110103 - 2²¹ = 121208012951 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 (121210110113) 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, 16863943 + ... + 16871128.

It is an arithmetic number, because the mean of its divisors is an integer number (30310962192).

Almost surely, 2^121210110103 is an apocalyptic number.

121210110103 is a deficient number, since it is larger than the sum of its proper divisors (33738665).

121210110103 is an equidigital number, since it uses as much as digits as its factorization.

121210110103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33738664.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121210110103 its reverse (301011012121), we get a palindrome (422221122224).

The spelling of 121210110103 in words is "one hundred twenty-one billion, two hundred ten million, one hundred ten thousand, one hundred three".