10221001213121 has 8 divisors (see below), whose sum is σ = 10263027063744. Its totient is φ = 10178985718000.

The previous prime is 10221001213103. The next prime is 10221001213141. The reversal of 10221001213121 is 12131210012201.

It is a happy number.

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 10221001213121 - 2⁶ = 10221001213057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10221001213121.

It is not an unprimeable number, because it can be changed into a prime (10221001213141) 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, 607685 + ... + 4561938.

It is an arithmetic number, because the mean of its divisors is an integer number (1282878382968).

Almost surely, 2^{10221001213121} is an apocalyptic number.

It is an amenable number.

10221001213121 is a deficient number, since it is larger than the sum of its proper divisors (42025850623).

10221001213121 is an equidigital number, since it uses as much as digits as its factorization.

10221001213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5177751.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 10221001213121 its reverse (12131210012201), we get a palindrome (22352211225322).

The spelling of 10221001213121 in words is "ten trillion, two hundred twenty-one billion, one million, two hundred thirteen thousand, one hundred twenty-one".