21151443443045 has 8 divisors (see below), whose sum is σ = 26200497684480. Its totient is φ = 16375311052560.

The previous prime is 21151443443029. The next prime is 21151443443069. The reversal of 21151443443045 is 54034434415112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21151443443045 - 2⁴ = 21151443443029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21151443442993 and 21151443443011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68230462565 + ... + 68230462874.

It is an arithmetic number, because the mean of its divisors is an integer number (3275062210560).

Almost surely, 2^{21151443443045} is an apocalyptic number.

It is an amenable number.

21151443443045 is a deficient number, since it is larger than the sum of its proper divisors (5049054241435).

21151443443045 is a wasteful number, since it uses less digits than its factorization.

21151443443045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136460925475.

The product of its (nonzero) digits is 460800, while the sum is 41.

Adding to 21151443443045 its reverse (54034434415112), we get a palindrome (75185877858157).

The spelling of 21151443443045 in words is "twenty-one trillion, one hundred fifty-one billion, four hundred forty-three million, four hundred forty-three thousand, forty-five".