10002011021221 has 16 divisors (see below), whose sum is σ = 10055328595200. Its totient is φ = 9948852345600.

The previous prime is 10002011021209. The next prime is 10002011021227. The reversal of 10002011021221 is 12212011020001.

It is a cyclic number.

It is not a de Polignac number, because 10002011021221 - 2²¹ = 10002008924069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002011021227) 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, 524177401 + ... + 524196481.

It is an arithmetic number, because the mean of its divisors is an integer number (628458037200).

Almost surely, 2^{10002011021221} is an apocalyptic number.

It is an amenable number.

10002011021221 is a deficient number, since it is larger than the sum of its proper divisors (53317573979).

10002011021221 is a wasteful number, since it uses less digits than its factorization.

10002011021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23100.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10002011021221 its reverse (12212011020001), we get a palindrome (22214022041222).

The spelling of 10002011021221 in words is "ten trillion, two billion, eleven million, twenty-one thousand, two hundred twenty-one".