21034857271881 has 8 divisors (see below), whose sum is σ = 28046508565824. Its totient is φ = 14023222079600.

The previous prime is 21034857271781. The next prime is 21034857272017. The reversal of 21034857271881 is 18817275843012.

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

It is a cyclic number.

It is not a de Polignac number, because 21034857271881 - 2⁹ = 21034857271369 is a prime.

It is a super-2 number, since 2×21034857271881² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21034857271781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548070 + ... + 6509231.

It is an arithmetic number, because the mean of its divisors is an integer number (3505813570728).

Almost surely, 2^{21034857271881} is an apocalyptic number.

It is an amenable number.

21034857271881 is a deficient number, since it is larger than the sum of its proper divisors (7011651293943).

21034857271881 is an equidigital number, since it uses as much as digits as its factorization.

21034857271881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050831.

The product of its (nonzero) digits is 6021120, while the sum is 57.

The spelling of 21034857271881 in words is "twenty-one trillion, thirty-four billion, eight hundred fifty-seven million, two hundred seventy-one thousand, eight hundred eighty-one".