1200103021121 has 2 divisors, whose sum is σ = 1200103021122. Its totient is φ = 1200103021120.

The previous prime is 1200103021099. The next prime is 1200103021153. The reversal of 1200103021121 is 1211203010021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 805800656896 + 394302364225 = 897664^2 + 627935^2 .

It is an emirp because it is prime and its reverse (1211203010021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200103021121 - 2³⁴ = 1182923151937 is a prime.

It is a super-2 number, since 2×1200103021121² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1200103021096 and 1200103021105.

It is not a weakly prime, because it can be changed into another prime (1200103021321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600051510560 + 600051510561.

It is an arithmetic number, because the mean of its divisors is an integer number (600051510561).

Almost surely, 2^{1200103021121} is an apocalyptic number.

It is an amenable number.

1200103021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200103021121 is an equidigital number, since it uses as much as digits as its factorization.

1200103021121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1200103021121 its reverse (1211203010021), we get a palindrome (2411306031142).

The spelling of 1200103021121 in words is "one trillion, two hundred billion, one hundred three million, twenty-one thousand, one hundred twenty-one".