2120112111221 has 32 divisors (see below), whose sum is σ = 2407436640000. Its totient is φ = 1850887991808.

The previous prime is 2120112111211. The next prime is 2120112111223. The reversal of 2120112111221 is 1221112110212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120112111221 is a prime.

It is a super-2 number, since 2×2120112111221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120112111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120112111223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528309011 + ... + 528313023.

It is an arithmetic number, because the mean of its divisors is an integer number (75232395000).

Almost surely, 2^{2120112111221} is an apocalyptic number.

It is an amenable number.

2120112111221 is a deficient number, since it is larger than the sum of its proper divisors (287324528779).

2120112111221 is a wasteful number, since it uses less digits than its factorization.

2120112111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7133.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2120112111221 its reverse (1221112110212), we get a palindrome (3341224221433).

It can be divided in two parts, 212011 and 2111221, that added together give a palindrome (2323232).

The spelling of 2120112111221 in words is "two trillion, one hundred twenty billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty-one".