1213221053 has 8 divisors (see below), whose sum is σ = 1366208256. Its totient is φ = 1067349600.

The previous prime is 1213221029. The next prime is 1213221067. The reversal of 1213221053 is 3501223121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213221053 - 2²⁰ = 1212172477 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 (1213221013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1778576 + ... + 1779257.

It is an arithmetic number, because the mean of its divisors is an integer number (170776032).

Almost surely, 2^1213221053 is an apocalyptic number.

It is an amenable number.

1213221053 is a deficient number, since it is larger than the sum of its proper divisors (152987203).

1213221053 is a wasteful number, since it uses less digits than its factorization.

1213221053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557875.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1213221053 is about 34831.3228718061. The cubic root of 1213221053 is about 1066.5469530471.

Adding to 1213221053 its reverse (3501223121), we get a palindrome (4714444174).

The spelling of 1213221053 in words is "one billion, two hundred thirteen million, two hundred twenty-one thousand, fifty-three".