10001200011221 has 16 divisors (see below), whose sum is σ = 11148207168960. Its totient is φ = 8916391560960.

The previous prime is 10001200011211. The next prime is 10001200011241. The reversal of 10001200011221 is 12211000210001.

It is a cyclic number.

It is not a de Polignac number, because 10001200011221 - 2²⁶ = 10001132902357 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 (10001200011211) 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, 772190 + ... + 4538576.

It is an arithmetic number, because the mean of its divisors is an integer number (696762948060).

Almost surely, 2^{10001200011221} is an apocalyptic number.

It is an amenable number.

10001200011221 is a deficient number, since it is larger than the sum of its proper divisors (1147007157739).

10001200011221 is a wasteful number, since it uses less digits than its factorization.

10001200011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3774644.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10001200011221 its reverse (12211000210001), we get a palindrome (22212200221222).

The spelling of 10001200011221 in words is "ten trillion, one billion, two hundred million, eleven thousand, two hundred twenty-one".