1202200121 has 4 divisors (see below), whose sum is σ = 1202337252. Its totient is φ = 1202062992.

The previous prime is 1202200099. The next prime is 1202200123. The reversal of 1202200121 is 1210022021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1172377600 + 29822521 = 34240^2 + 5461^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202200121 - 2¹⁴ = 1202183737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1202200123) 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, 54446 + ... + 73271.

It is an arithmetic number, because the mean of its divisors is an integer number (300584313).

Almost surely, 2^1202200121 is an apocalyptic number.

It is an amenable number.

1202200121 is a deficient number, since it is larger than the sum of its proper divisors (137131).

1202200121 is an equidigital number, since it uses as much as digits as its factorization.

1202200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137130.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1202200121 is about 34672.7576203566. The cubic root of 1202200121 is about 1063.3076108618.

Adding to 1202200121 its reverse (1210022021), we get a palindrome (2412222142).

The spelling of 1202200121 in words is "one billion, two hundred two million, two hundred thousand, one hundred twenty-one".