2121222111000 has 128 divisors (see below), whose sum is σ = 6966540172800. Its totient is φ = 535887676800.

The previous prime is 2121222110939. The next prime is 2121222111017. The reversal of 2121222111000 is 1112221212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18550212 + ... + 18664211.

It is an arithmetic number, because the mean of its divisors is an integer number (54426095100).

Almost surely, 2^{2121222111000} is an apocalyptic number.

2121222111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121222111000 is an abundant number, since it is smaller than the sum of its proper divisors (4845318061800).

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

2121222111000 is a wasteful number, since it uses less digits than its factorization.

2121222111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37214466 (or 37214452 counting only the distinct ones).

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

Adding to 2121222111000 its reverse (1112221212), we get a palindrome (2122334332212).

The spelling of 2121222111000 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred eleven thousand".