100121202212221 has 4 divisors (see below), whose sum is σ = 102449602263712. Its totient is φ = 97792802160732.

The previous prime is 100121202212197. The next prime is 100121202212231. The reversal of 100121202212221 is 122212202121001.

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 100121202212221 - 2⁵ = 100121202212189 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 (100121202212231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164200025681 + ... + 1164200025766.

It is an arithmetic number, because the mean of its divisors is an integer number (25612400565928).

Almost surely, 2^{100121202212221} is an apocalyptic number.

It is an amenable number.

100121202212221 is a deficient number, since it is larger than the sum of its proper divisors (2328400051491).

100121202212221 is an equidigital number, since it uses as much as digits as its factorization.

100121202212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328400051490.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 100121202212221 its reverse (122212202121001), we get a palindrome (222333404333222).

The spelling of 100121202212221 in words is "one hundred trillion, one hundred twenty-one billion, two hundred two million, two hundred twelve thousand, two hundred twenty-one".