2201012001221 has 4 divisors (see below), whose sum is σ = 2401104001344. Its totient is φ = 2000920001100.

The previous prime is 2201012001203. The next prime is 2201012001257. The reversal of 2201012001221 is 1221002101022.

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 a de Polignac number, because none of the positive numbers 2^k-2201012001221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201012001196 and 2201012001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201012081221) 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, 100046000045 + ... + 100046000066.

It is an arithmetic number, because the mean of its divisors is an integer number (600276000336).

Almost surely, 2^{2201012001221} is an apocalyptic number.

It is an amenable number.

2201012001221 is a deficient number, since it is larger than the sum of its proper divisors (200092000123).

2201012001221 is a wasteful number, since it uses less digits than its factorization.

2201012001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200092000122.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2201012001221 its reverse (1221002101022), we get a palindrome (3422014102243).

The spelling of 2201012001221 in words is "two trillion, two hundred one billion, twelve million, one thousand, two hundred twenty-one".