2152153421021 has 2 divisors, whose sum is σ = 2152153421022. Its totient is φ = 2152153421020.

The previous prime is 2152153421009. The next prime is 2152153421059. The reversal of 2152153421021 is 1201243512512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1465094788921 + 687058632100 = 1210411^2 + 828890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2152153421021 is a prime.

It is a super-2 number, since 2×2152153421021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2152153421081) by changing a digit.

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 as a sum of consecutive naturals, namely, 1076076710510 + 1076076710511.

It is an arithmetic number, because the mean of its divisors is an integer number (1076076710511).

Almost surely, 2^{2152153421021} is an apocalyptic number.

It is an amenable number.

2152153421021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152153421021 is an equidigital number, since it uses as much as digits as its factorization.

2152153421021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 2152153421021 its reverse (1201243512512), we get a palindrome (3353396933533).

The spelling of 2152153421021 in words is "two trillion, one hundred fifty-two billion, one hundred fifty-three million, four hundred twenty-one thousand, twenty-one".