2211021120021 has 16 divisors (see below), whose sum is σ = 3369708086784. Its totient is φ = 1263240747504.

The previous prime is 2211021119981. The next prime is 2211021120041. The reversal of 2211021120021 is 1200211201122.

It is not a de Polignac number, because 2211021120021 - 2⁹ = 2211021119509 is a prime.

It is a super-2 number, since 2×2211021120021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211021120041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8192911 + ... + 8458476.

It is an arithmetic number, because the mean of its divisors is an integer number (210606755424).

Almost surely, 2^{2211021120021} is an apocalyptic number.

2211021120021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2211021120021 is a deficient number, since it is larger than the sum of its proper divisors (1158686966763).

2211021120021 is a wasteful number, since it uses less digits than its factorization.

2211021120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16657720.

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

Adding to 2211021120021 its reverse (1200211201122), we get a palindrome (3411232321143).

The spelling of 2211021120021 in words is "two trillion, two hundred eleven billion, twenty-one million, one hundred twenty thousand, twenty-one".