10211021001221 has 16 divisors (see below), whose sum is σ = 10762901961600. Its totient is φ = 9660591360000.

The previous prime is 10211021001191. The next prime is 10211021001229. The reversal of 10211021001221 is 12210012011201.

It is a cyclic number.

It is not a de Polignac number, because 10211021001221 - 2¹⁰ = 10211021000197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211021001196 and 10211021001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211021001229) 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 15 ways as a sum of consecutive naturals, for example, 69788381 + ... + 69934541.

It is an arithmetic number, because the mean of its divisors is an integer number (672681372600).

Almost surely, 2^{10211021001221} is an apocalyptic number.

It is an amenable number.

10211021001221 is a deficient number, since it is larger than the sum of its proper divisors (551880960379).

10211021001221 is a wasteful number, since it uses less digits than its factorization.

10211021001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151100.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10211021001221 its reverse (12210012011201), we get a palindrome (22421033012422).

The spelling of 10211021001221 in words is "ten trillion, two hundred eleven billion, twenty-one million, one thousand, two hundred twenty-one".