2121031425252 has 192 divisors, whose sum is σ = 5302989619200. Its totient is φ = 657921761280.

The previous prime is 2121031425229. The next prime is 2121031425281. The reversal of 2121031425252 is 2525241301212.

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, 1658350749 + ... + 1658352027.

It is an arithmetic number, because the mean of its divisors is an integer number (27619737600).

Almost surely, 2^{2121031425252} 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 2121031425252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2651494809600).

2121031425252 is an abundant number, since it is smaller than the sum of its proper divisors (3181958193948).

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

2121031425252 is a wasteful number, since it uses less digits than its factorization.

2121031425252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946 (or 1944 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 2121031425252 its reverse (2525241301212), we get a palindrome (4646272726464).

The spelling of 2121031425252 in words is "two trillion, one hundred twenty-one billion, thirty-one million, four hundred twenty-five thousand, two hundred fifty-two".