21470143521123 has 24 divisors (see below), whose sum is σ = 33980779849536. Its totient is φ = 12954885678000.

The previous prime is 21470143521031. The next prime is 21470143521161. The reversal of 21470143521123 is 32112534107412.

21470143521123 is a `hidden beast` number, since 2 + 1 + 4 + 7 + 0 + 1 + 4 + 3 + 521 + 123 = 666.

It is not a de Polignac number, because 21470143521123 - 2²¹ = 21470141423971 is a prime.

It is a super-2 number, since 2×21470143521123² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21470143522123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 477665053 + ... + 477709998.

It is an arithmetic number, because the mean of its divisors is an integer number (1415865827064).

Almost surely, 2^{21470143521123} is an apocalyptic number.

21470143521123 is a deficient number, since it is larger than the sum of its proper divisors (12510636328413).

21470143521123 is a wasteful number, since it uses less digits than its factorization.

21470143521123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955375295 (or 955375292 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

Adding to 21470143521123 its reverse (32112534107412), we get a palindrome (53582677628535).

The spelling of 21470143521123 in words is "twenty-one trillion, four hundred seventy billion, one hundred forty-three million, five hundred twenty-one thousand, one hundred twenty-three".