21275123043254 has 16 divisors (see below), whose sum is σ = 34750654700400. Its totient is φ = 9730183315104.

The previous prime is 21275123043247. The next prime is 21275123043277. The reversal of 21275123043254 is 45234032157212.

It is a happy number.

It is a super-3 number, since 3×21275123043254³ (a number of 41 digits) contains 333 as substring.

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, 9652958537 + ... + 9652960740.

It is an arithmetic number, because the mean of its divisors is an integer number (2171915918775).

Almost surely, 2^{21275123043254} is an apocalyptic number.

21275123043254 is a deficient number, since it is larger than the sum of its proper divisors (13475531657146).

21275123043254 is a wasteful number, since it uses less digits than its factorization.

21275123043254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19305919327.

The product of its (nonzero) digits is 403200, while the sum is 41.

The spelling of 21275123043254 in words is "twenty-one trillion, two hundred seventy-five billion, one hundred twenty-three million, forty-three thousand, two hundred fifty-four".