2120211111221 has 8 divisors (see below), whose sum is σ = 2423199186624. Its totient is φ = 1817248229280.

The previous prime is 2120211111209. The next prime is 2120211111223. The reversal of 2120211111221 is 1221111120212.

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 2120211111221 - 2²² = 2120206916917 is a prime.

It is a super-2 number, since 2×2120211111221² (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 2120211111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120211111223) 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, 6117680 + ... + 6454953.

It is an arithmetic number, because the mean of its divisors is an integer number (302899898328).

Almost surely, 2^{2120211111221} is an apocalyptic number.

It is an amenable number.

2120211111221 is a deficient number, since it is larger than the sum of its proper divisors (302988075403).

2120211111221 is a wasteful number, since it uses less digits than its factorization.

2120211111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12596731.

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

Adding to 2120211111221 its reverse (1221111120212), we get a palindrome (3341322231433).

The spelling of 2120211111221 in words is "two trillion, one hundred twenty billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty-one".