1021213253 has 8 divisors (see below), whose sum is σ = 1055106816. Its totient is φ = 987379200.

The previous prime is 1021213247. The next prime is 1021213289. The reversal of 1021213253 is 3523121201.

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 1021213253 - 2¹² = 1021209157 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 (1021213553) 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, 21458 + ... + 50028.

It is an arithmetic number, because the mean of its divisors is an integer number (131888352).

Almost surely, 2^1021213253 is an apocalyptic number.

It is an amenable number.

1021213253 is a deficient number, since it is larger than the sum of its proper divisors (33893563).

1021213253 is a wasteful number, since it uses less digits than its factorization.

1021213253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29755.

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

The square root of 1021213253 is about 31956.4274129634. The cubic root of 1021213253 is about 1007.0216651536.

Adding to 1021213253 its reverse (3523121201), we get a palindrome (4544334454).

The spelling of 1021213253 in words is "one billion, twenty-one million, two hundred thirteen thousand, two hundred fifty-three".