1203100121 has 4 divisors (see below), whose sum is σ = 1266421200. Its totient is φ = 1139779044.

The previous prime is 1203100117. The next prime is 1203100141. The reversal of 1203100121 is 1210013021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1210013021 = 7 ⋅172859003.

It is a cyclic number.

It is not a de Polignac number, because 1203100121 - 2² = 1203100117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203100141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31660511 + ... + 31660548.

It is an arithmetic number, because the mean of its divisors is an integer number (316605300).

Almost surely, 2^1203100121 is an apocalyptic number.

It is an amenable number.

1203100121 is a deficient number, since it is larger than the sum of its proper divisors (63321079).

1203100121 is an equidigital number, since it uses as much as digits as its factorization.

1203100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63321078.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1203100121 is about 34685.7336811549. The cubic root of 1203100121 is about 1063.5728850941.

Adding to 1203100121 its reverse (1210013021), we get a palindrome (2413113142).

The spelling of 1203100121 in words is "one billion, two hundred three million, one hundred thousand, one hundred twenty-one".