2121030241525 has 12 divisors (see below), whose sum is σ = 2832391153732. Its totient is φ = 1566299255040.

The previous prime is 2121030241493. The next prime is 2121030241553. The reversal of 2121030241525 is 5251420301212.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 9963633124 + 2111066608401 = 99818^2 + 1452951^2 .

It is not a de Polignac number, because 2121030241525 - 2⁵ = 2121030241493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121030241493 and 2121030241502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3263123124 + ... + 3263123773.

Almost surely, 2^{2121030241525} is an apocalyptic number.

2121030241525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2121030241525 is a deficient number, since it is larger than the sum of its proper divisors (711360912207).

2121030241525 is a wasteful number, since it uses less digits than its factorization.

2121030241525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6526246920 (or 6526246915 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 2121030241525 its reverse (5251420301212), we get a palindrome (7372450542737).

The spelling of 2121030241525 in words is "two trillion, one hundred twenty-one billion, thirty million, two hundred forty-one thousand, five hundred twenty-five".