2121254300425 has 24 divisors (see below), whose sum is σ = 2832764488344. Its totient is φ = 1566423720960.

The previous prime is 2121254300423. The next prime is 2121254300489. The reversal of 2121254300425 is 5240034521212.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 936631033209 + 1184623267216 = 967797^2 + 1088404^2 .

It is not a de Polignac number, because 2121254300425 - 2¹ = 2121254300423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121254300423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18700179 + ... + 18813271.

It is an arithmetic number, because the mean of its divisors is an integer number (118031853681).

Almost surely, 2^{2121254300425} is an apocalyptic number.

2121254300425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2121254300425 is a deficient number, since it is larger than the sum of its proper divisors (711510187919).

2121254300425 is a wasteful number, since it uses less digits than its factorization.

2121254300425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170829 (or 170824 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 2121254300425 its reverse (5240034521212), we get a palindrome (7361288821637).

The spelling of 2121254300425 in words is "two trillion, one hundred twenty-one billion, two hundred fifty-four million, three hundred thousand, four hundred twenty-five".