2121003223212 has 96 divisors (see below), whose sum is σ = 5319369828864. Its totient is φ = 656121945600.

The previous prime is 2121003223081. The next prime is 2121003223247. The reversal of 2121003223212 is 2123223001212.

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, 1530423 + ... + 2565969.

It is an arithmetic number, because the mean of its divisors is an integer number (55410102384).

Almost surely, 2^{2121003223212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121003223212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2659684914432).

2121003223212 is an abundant number, since it is smaller than the sum of its proper divisors (3198366605652).

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

2121003223212 is a wasteful number, since it uses less digits than its factorization.

2121003223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035799 (or 1035797 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2121003223212 its reverse (2123223001212), we get a palindrome (4244226224424).

The spelling of 2121003223212 in words is "two trillion, one hundred twenty-one billion, three million, two hundred twenty-three thousand, two hundred twelve".