2121121222000 has 160 divisors (see below), whose sum is σ = 5599322209728. Its totient is φ = 770739200000.

The previous prime is 2121121221997. The next prime is 2121121222079. The reversal of 2121121222000 is 2221211212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29906580 + ... + 29977420.

Almost surely, 2^{2121121222000} is an apocalyptic number.

2121121222000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121121222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2799661104864).

2121121222000 is an abundant number, since it is smaller than the sum of its proper divisors (3478200987728).

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

2121121222000 is a wasteful number, since it uses less digits than its factorization.

2121121222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72236 (or 72220 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121121222000 its reverse (2221211212), we get a palindrome (2123342433212).

It can be divided in two parts, 21211212 and 22000, that added together give a palindrome (21233212).

The spelling of 2121121222000 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand".