1202022121 has 4 divisors (see below), whose sum is σ = 1202484052. Its totient is φ = 1201560192.

The previous prime is 1202022097. The next prime is 1202022149. The reversal of 1202022121 is 1212202021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1212202021 = 31 ⋅39103291.

It can be written as a sum of positive squares in 2 ways, for example, as 820249600 + 381772521 = 28640^2 + 19539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202022121 - 2²¹ = 1199924969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1202022191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227040 + ... + 232273.

It is an arithmetic number, because the mean of its divisors is an integer number (300621013).

Almost surely, 2^1202022121 is an apocalyptic number.

It is an amenable number.

1202022121 is a deficient number, since it is larger than the sum of its proper divisors (461931).

1202022121 is an equidigital number, since it uses as much as digits as its factorization.

1202022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461930.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1202022121 is about 34670.1906686421. The cubic root of 1202022121 is about 1063.2551298332.

Adding to 1202022121 its reverse (1212202021), we get a palindrome (2414224142).

The spelling of 1202022121 in words is "one billion, two hundred two million, twenty-two thousand, one hundred twenty-one".