1202010121 has 4 divisors (see below), whose sum is σ = 1294472452. Its totient is φ = 1109547792.

The previous prime is 1202010113. The next prime is 1202010149. The reversal of 1202010121 is 1210102021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1210102021 = 811 ⋅1492111.

It can be written as a sum of positive squares in 2 ways, for example, as 53816896 + 1148193225 = 7336^2 + 33885^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202010121 - 2³ = 1202010113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202010098 and 1202010107.

It is not an unprimeable number, because it can be changed into a prime (1202010221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46231146 + ... + 46231171.

It is an arithmetic number, because the mean of its divisors is an integer number (323618113).

Almost surely, 2^1202010121 is an apocalyptic number.

It is an amenable number.

1202010121 is a deficient number, since it is larger than the sum of its proper divisors (92462331).

1202010121 is an equidigital number, since it uses as much as digits as its factorization.

1202010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92462330.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1202010121 is about 34670.0176088793. The cubic root of 1202010121 is about 1063.2515915999.

Adding to 1202010121 its reverse (1210102021), we get a palindrome (2412112142).

The spelling of 1202010121 in words is "one billion, two hundred two million, ten thousand, one hundred twenty-one".