121012121210103 has 10 divisors (see below), whose sum is σ = 180771193412744. Its totient is φ = 80674747473348.

The previous prime is 121012121210093. The next prime is 121012121210237. The reversal of 121012121210103 is 301012121210121.

It is a happy number.

121012121210103 is a `hidden beast` number, since 1 + 210 + 121 + 21 + 210 + 103 = 666.

It is not a de Polignac number, because 121012121210103 - 2¹⁶ = 121012121144567 is a prime.

It is a super-2 number, since 2×121012121210103² (a number of 29 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012121260103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 746988402451 + ... + 746988402612.

Almost surely, 2^{121012121210103} is an apocalyptic number.

121012121210103 is a deficient number, since it is larger than the sum of its proper divisors (59759072202641).

121012121210103 is an equidigital number, since it uses as much as digits as its factorization.

121012121210103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493976805075 (or 1493976805066 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 121012121210103 its sum of digits (18), we get a palindrome (121012121210121).

Adding to 121012121210103 its reverse (301012121210121), we get a palindrome (422024242420224).

The spelling of 121012121210103 in words is "one hundred twenty-one trillion, twelve billion, one hundred twenty-one million, two hundred ten thousand, one hundred three".