10012312321221 has 16 divisors (see below), whose sum is σ = 15506969280128. Its totient is φ = 5627529172800.

The previous prime is 10012312321217. The next prime is 10012312321229. The reversal of 10012312321221 is 12212321321001.

It is not a de Polignac number, because 10012312321221 - 2² = 10012312321217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10012312321229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3908005090 + ... + 3908007651.

It is an arithmetic number, because the mean of its divisors is an integer number (969185580008).

Almost surely, 2^{10012312321221} is an apocalyptic number.

It is an amenable number.

10012312321221 is a deficient number, since it is larger than the sum of its proper divisors (5494656958907).

10012312321221 is an equidigital number, since it uses as much as digits as its factorization.

10012312321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7816012812.

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

Adding to 10012312321221 its reverse (12212321321001), we get a palindrome (22224633642222).

It can be divided in two parts, 100 and 12312321221, that added together give a palindrome (12312321321).

The spelling of 10012312321221 in words is "ten trillion, twelve billion, three hundred twelve million, three hundred twenty-one thousand, two hundred twenty-one".