10121200021221 has 8 divisors (see below), whose sum is σ = 14205193012320. Its totient is φ = 6392336855472.

The previous prime is 10121200021211. The next prime is 10121200021249. The reversal of 10121200021221 is 12212000212101.

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

It is not a de Polignac number, because 10121200021221 - 2²¹ = 10121197924069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10121200021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121200021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88782456270 + ... + 88782456383.

It is an arithmetic number, because the mean of its divisors is an integer number (1775649126540).

Almost surely, 2^{10121200021221} is an apocalyptic number.

It is an amenable number.

10121200021221 is a deficient number, since it is larger than the sum of its proper divisors (4083992991099).

10121200021221 is a wasteful number, since it uses less digits than its factorization.

10121200021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177564912675.

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

Adding to 10121200021221 its reverse (12212000212101), we get a palindrome (22333200233322).

The spelling of 10121200021221 in words is "ten trillion, one hundred twenty-one billion, two hundred million, twenty-one thousand, two hundred twenty-one".