2100101221221 has 8 divisors (see below), whose sum is σ = 2800160589504. Its totient is φ = 1400054666880.

The previous prime is 2100101221217. The next prime is 2100101221241. The reversal of 2100101221221 is 1221221010012.

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

It is not a de Polignac number, because 2100101221221 - 2² = 2100101221217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100101221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100101221241) 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, 2814316 + ... + 3481461.

It is an arithmetic number, because the mean of its divisors is an integer number (350020073688).

Almost surely, 2^{2100101221221} is an apocalyptic number.

It is an amenable number.

2100101221221 is a deficient number, since it is larger than the sum of its proper divisors (700059368283).

2100101221221 is a wasteful number, since it uses less digits than its factorization.

2100101221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406971.

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

Adding to 2100101221221 its reverse (1221221010012), we get a palindrome (3321322231233).

The spelling of 2100101221221 in words is "two trillion, one hundred billion, one hundred one million, two hundred twenty-one thousand, two hundred twenty-one".