2101233121221 has 8 divisors (see below), whose sum is σ = 3017155251040. Its totient is φ = 1293066536112.

The previous prime is 2101233121217. The next prime is 2101233121223. The reversal of 2101233121221 is 1221213321012.

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

It is not a de Polignac number, because 2101233121221 - 2² = 2101233121217 is a prime.

It is a super-2 number, since 2×2101233121221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101233121223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26938886131 + ... + 26938886208.

It is an arithmetic number, because the mean of its divisors is an integer number (377144406380).

Almost surely, 2^{2101233121221} is an apocalyptic number.

It is an amenable number.

2101233121221 is a deficient number, since it is larger than the sum of its proper divisors (915922129819).

2101233121221 is a wasteful number, since it uses less digits than its factorization.

2101233121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53877772355.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2101233121221 its reverse (1221213321012), we get a palindrome (3322446442233).

The spelling of 2101233121221 in words is "two trillion, one hundred one billion, two hundred thirty-three million, one hundred twenty-one thousand, two hundred twenty-one".