1020221213 has 4 divisors (see below), whose sum is σ = 1112968608. Its totient is φ = 927473820.

The previous prime is 1020221179. The next prime is 1020221231. The reversal of 1020221213 is 3121220201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3121220201 = 11 ⋅283747291.

It is a cyclic number.

It is not a de Polignac number, because 1020221213 - 2⁶ = 1020221149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020221233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46373681 + ... + 46373702.

It is an arithmetic number, because the mean of its divisors is an integer number (278242152).

Almost surely, 2^1020221213 is an apocalyptic number.

It is an amenable number.

1020221213 is a deficient number, since it is larger than the sum of its proper divisors (92747395).

1020221213 is an equidigital number, since it uses as much as digits as its factorization.

1020221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92747394.

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

The square root of 1020221213 is about 31940.9018814435. The cubic root of 1020221213 is about 1006.6954748979.

Adding to 1020221213 its reverse (3121220201), we get a palindrome (4141441414).

The spelling of 1020221213 in words is "one billion, twenty million, two hundred twenty-one thousand, two hundred thirteen".