20101002112221 has 4 divisors (see below), whose sum is σ = 26801336149632. Its totient is φ = 13400668074812.

The previous prime is 20101002112199. The next prime is 20101002112253. The reversal of 20101002112221 is 12221120010102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20101002112221 - 2²⁹ = 20100465241309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20101002112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101002112021) 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 3 ways as a sum of consecutive naturals, for example, 3350167018701 + ... + 3350167018706.

It is an arithmetic number, because the mean of its divisors is an integer number (6700334037408).

Almost surely, 2^{20101002112221} is an apocalyptic number.

It is an amenable number.

20101002112221 is a deficient number, since it is larger than the sum of its proper divisors (6700334037411).

20101002112221 is an equidigital number, since it uses as much as digits as its factorization.

20101002112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700334037410.

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

Adding to 20101002112221 its reverse (12221120010102), we get a palindrome (32322122122323).

The spelling of 20101002112221 in words is "twenty trillion, one hundred one billion, two million, one hundred twelve thousand, two hundred twenty-one".