10001121202221 has 32 divisors (see below), whose sum is σ = 13725286549248. Its totient is φ = 6472988121600.

The previous prime is 10001121202199. The next prime is 10001121202253. The reversal of 10001121202221 is 12220212110001.

It is not a de Polignac number, because 10001121202221 - 2²⁶ = 10001054093357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10001121202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001121202291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122071371 + ... + 122153271.

It is an arithmetic number, because the mean of its divisors is an integer number (428915204664).

Almost surely, 2^{10001121202221} is an apocalyptic number.

It is an amenable number.

10001121202221 is a deficient number, since it is larger than the sum of its proper divisors (3724165347027).

10001121202221 is a wasteful number, since it uses less digits than its factorization.

10001121202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84341.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 10001121202221 its reverse (12220212110001), we get a palindrome (22221333312222).

The spelling of 10001121202221 in words is "ten trillion, one billion, one hundred twenty-one million, two hundred two thousand, two hundred twenty-one".