1021231103221 has 8 divisors (see below), whose sum is σ = 1168213057280. Its totient is φ = 874522098288.

The previous prime is 1021231103219. The next prime is 1021231103261. The reversal of 1021231103221 is 1223011321201.

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 1021231103221 - 2¹ = 1021231103219 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 (1021231103201) 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, 68229261 + ... + 68244226.

It is an arithmetic number, because the mean of its divisors is an integer number (146026632160).

Almost surely, 2^{1021231103221} is an apocalyptic number.

It is an amenable number.

1021231103221 is a deficient number, since it is larger than the sum of its proper divisors (146981954059).

1021231103221 is a wasteful number, since it uses less digits than its factorization.

1021231103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136474563.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1021231103221 its reverse (1223011321201), we get a palindrome (2244242424422).

The spelling of 1021231103221 in words is "one trillion, twenty-one billion, two hundred thirty-one million, one hundred three thousand, two hundred twenty-one".