2121211112040 has 256 divisors, whose sum is σ = 7470154368000. Its totient is φ = 534530304000.

The previous prime is 2121211112039. The next prime is 2121211112099. The reversal of 2121211112040 is 402111121212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 751540 + ... + 2192540.

It is an arithmetic number, because the mean of its divisors is an integer number (29180290500).

Almost surely, 2^{2121211112040} is an apocalyptic number.

2121211112040 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 2121211112040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3735077184000).

2121211112040 is an abundant number, since it is smaller than the sum of its proper divisors (5348943255960).

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

2121211112040 is a wasteful number, since it uses less digits than its factorization.

2121211112040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441097 (or 1441087 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2121211112040 its reverse (402111121212), we get a palindrome (2523322233252).

The spelling of 2121211112040 in words is "two trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, forty".