1202021213 has 4 divisors (see below), whose sum is σ = 1207718208. Its totient is φ = 1196324220.

The previous prime is 1202021209. The next prime is 1202021237. The reversal of 1202021213 is 3121202021.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1202021213 - 2² = 1202021209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202021243) 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, 2848181 + ... + 2848602.

It is an arithmetic number, because the mean of its divisors is an integer number (301929552).

Almost surely, 2^1202021213 is an apocalyptic number.

It is an amenable number.

1202021213 is a deficient number, since it is larger than the sum of its proper divisors (5696995).

1202021213 is an equidigital number, since it uses as much as digits as its factorization.

1202021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696994.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1202021213 is about 34670.1775738170. The cubic root of 1202021213 is about 1063.2548621077.

Adding to 1202021213 its reverse (3121202021), we get a palindrome (4323223234).

It can be divided in two parts, 12020 and 21213, that added together give a palindrome (33233).

The spelling of 1202021213 in words is "one billion, two hundred two million, twenty-one thousand, two hundred thirteen".