2201100121021 has 4 divisors (see below), whose sum is σ = 2201205261600. Its totient is φ = 2200994980444.

The previous prime is 2201100121013. The next prime is 2201100121037. The reversal of 2201100121021 is 1201210011022.

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 2201100121021 - 2³ = 2201100121013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201100120992 and 2201100121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201100121081) 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, 52538881 + ... + 52580758.

It is an arithmetic number, because the mean of its divisors is an integer number (550301315400).

Almost surely, 2^{2201100121021} is an apocalyptic number.

It is an amenable number.

2201100121021 is a deficient number, since it is larger than the sum of its proper divisors (105140579).

2201100121021 is a wasteful number, since it uses less digits than its factorization.

2201100121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105140578.

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

Adding to 2201100121021 its reverse (1201210011022), we get a palindrome (3402310132043).

The spelling of 2201100121021 in words is "two trillion, two hundred one billion, one hundred million, one hundred twenty-one thousand, twenty-one".