2151121051025 has 24 divisors (see below), whose sum is σ = 2729072524608. Its totient is φ = 1681475400000.

The previous prime is 2151121051019. The next prime is 2151121051031. The reversal of 2151121051025 is 5201501211512.

It is an interprime number because it is at equal distance from previous prime (2151121051019) and next prime (2151121051031).

It is not a de Polignac number, because 2151121051025 - 2¹² = 2151121046929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151121050985 and 2151121051003.

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 23 ways as a sum of consecutive naturals, for example, 4440491 + ... + 4901040.

It is an arithmetic number, because the mean of its divisors is an integer number (113711355192).

Almost surely, 2^{2151121051025} is an apocalyptic number.

2151121051025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2151121051025 is a deficient number, since it is larger than the sum of its proper divisors (577951473583).

2151121051025 is a wasteful number, since it uses less digits than its factorization.

2151121051025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9341753 (or 9341748 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 26.

Adding to 2151121051025 its reverse (5201501211512), we get a palindrome (7352622262537).

The spelling of 2151121051025 in words is "two trillion, one hundred fifty-one billion, one hundred twenty-one million, fifty-one thousand, twenty-five".