2112101201221 has 4 divisors (see below), whose sum is σ = 2304110401344. Its totient is φ = 1920092001100.

The previous prime is 2112101201183. The next prime is 2112101201251. The reversal of 2112101201221 is 1221021012112.

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 2112101201221 - 2²¹ = 2112099104069 is a prime.

It is a super-2 number, since 2×2112101201221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112101201195 and 2112101201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112101201251) 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, 96004600045 + ... + 96004600066.

It is an arithmetic number, because the mean of its divisors is an integer number (576027600336).

Almost surely, 2^{2112101201221} is an apocalyptic number.

It is an amenable number.

2112101201221 is a deficient number, since it is larger than the sum of its proper divisors (192009200123).

2112101201221 is a wasteful number, since it uses less digits than its factorization.

2112101201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192009200122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2112101201221 its reverse (1221021012112), we get a palindrome (3333122213333).

The spelling of 2112101201221 in words is "two trillion, one hundred twelve billion, one hundred one million, two hundred one thousand, two hundred twenty-one".