21152541325043 has 4 divisors (see below), whose sum is σ = 21511058974680. Its totient is φ = 20794023675408.

The previous prime is 21152541324973. The next prime is 21152541325051. The reversal of 21152541325043 is 34052314525112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21152541325043 - 2¹² = 21152541320947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21152541324988 and 21152541325006.

It is not an unprimeable number, because it can be changed into a prime (21152541325843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179258824730 + ... + 179258824847.

It is an arithmetic number, because the mean of its divisors is an integer number (5377764743670).

Almost surely, 2^{21152541325043} is an apocalyptic number.

21152541325043 is a deficient number, since it is larger than the sum of its proper divisors (358517649637).

21152541325043 is an equidigital number, since it uses as much as digits as its factorization.

21152541325043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358517649636.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 21152541325043 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred forty-one million, three hundred twenty-five thousand, forty-three".