1012131232221 has 8 divisors (see below), whose sum is σ = 1349529175744. Its totient is φ = 674743721760.

The previous prime is 1012131232193. The next prime is 1012131232247. The reversal of 1012131232221 is 1222321312101.

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

It is not a de Polignac number, because 1012131232221 - 2²⁷ = 1011997014493 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 (1012131232121) 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, 2379025 + ... + 2772006.

It is an arithmetic number, because the mean of its divisors is an integer number (168691146968).

Almost surely, 2^{1012131232221} is an apocalyptic number.

It is an amenable number.

1012131232221 is a deficient number, since it is larger than the sum of its proper divisors (337397943523).

1012131232221 is an equidigital number, since it uses as much as digits as its factorization.

1012131232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5216531.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1012131232221 its reverse (1222321312101), we get a palindrome (2234452544322).

The spelling of 1012131232221 in words is "one trillion, twelve billion, one hundred thirty-one million, two hundred thirty-two thousand, two hundred twenty-one".