21010021210319 has 16 divisors (see below), whose sum is σ = 23028523650720. Its totient is φ = 19079396044800.

The previous prime is 21010021210291. The next prime is 21010021210333. The reversal of 21010021210319 is 91301212001012.

It is not a de Polignac number, because 21010021210319 - 2⁸ = 21010021210063 is a prime.

It is a super-4 number, since 4×21010021210319⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010021210294 and 21010021210303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010021210369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13637282 + ... + 15099519.

It is an arithmetic number, because the mean of its divisors is an integer number (1439282728170).

Almost surely, 2^{21010021210319} is an apocalyptic number.

21010021210319 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21010021210319 is a deficient number, since it is larger than the sum of its proper divisors (2018502440401).

21010021210319 is a wasteful number, since it uses less digits than its factorization.

21010021210319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28738330.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 21010021210319 in words is "twenty-one trillion, ten billion, twenty-one million, two hundred ten thousand, three hundred nineteen".