12151051021 has 2 divisors, whose sum is σ = 12151051022. Its totient is φ = 12151051020.

The previous prime is 12151051001. The next prime is 12151051027. The reversal of 12151051021 is 12015015121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7531809796 + 4619241225 = 86786^2 + 67965^2 .

It is a cyclic number.

It is not a de Polignac number, because 12151051021 - 2¹³ = 12151042829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12151051021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12151051027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6075525510 + 6075525511.

It is an arithmetic number, because the mean of its divisors is an integer number (6075525511).

Almost surely, 2^12151051021 is an apocalyptic number.

It is an amenable number.

12151051021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12151051021 is an equidigital number, since it uses as much as digits as its factorization.

12151051021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 19.

Adding to 12151051021 its reverse (12015015121), we get a palindrome (24166066142).

The spelling of 12151051021 in words is "twelve billion, one hundred fifty-one million, fifty-one thousand, twenty-one".