2211121001020 has 12 divisors (see below), whose sum is σ = 4643354102184. Its totient is φ = 884448400400.

The previous prime is 2211121001003. The next prime is 2211121001021. The reversal of 2211121001020 is 201001211122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211121001021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55278025006 + ... + 55278025045.

It is an arithmetic number, because the mean of its divisors is an integer number (386946175182).

Almost surely, 2^{2211121001020} is an apocalyptic number.

2211121001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211121001020 is an abundant number, since it is smaller than the sum of its proper divisors (2432233101164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2211121001020 is a wasteful number, since it uses less digits than its factorization.

2211121001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110556050060 (or 110556050058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2211121001020 its reverse (201001211122), we get a palindrome (2412122212142).

The spelling of 2211121001020 in words is "two trillion, two hundred eleven billion, one hundred twenty-one million, one thousand, twenty".