2102201001221 has 8 divisors (see below), whose sum is σ = 2212873893600. Its totient is φ = 1991531182320.

The previous prime is 2102201001169. The next prime is 2102201001223. The reversal of 2102201001221 is 1221001022012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2102201001221 - 2³⁴ = 2085021132037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102201001196 and 2102201001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102201001223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708395 + ... + 2169383.

It is an arithmetic number, because the mean of its divisors is an integer number (276609236700).

Almost surely, 2^{2102201001221} is an apocalyptic number.

It is an amenable number.

2102201001221 is a deficient number, since it is larger than the sum of its proper divisors (110672892379).

2102201001221 is a wasteful number, since it uses less digits than its factorization.

2102201001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536739.

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

Adding to 2102201001221 its reverse (1221001022012), we get a palindrome (3323202023233).

The spelling of 2102201001221 in words is "two trillion, one hundred two billion, two hundred one million, one thousand, two hundred twenty-one".