210021311101231 has 8 divisors (see below), whose sum is σ = 240024444463520. Its totient is φ = 180018199968768.

The previous prime is 210021311101219. The next prime is 210021311101333. The reversal of 210021311101231 is 132101113120012.

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

It is not a de Polignac number, because 210021311101231 - 2²³ = 210021302712623 is a prime.

It is a super-2 number, since 2×210021311101231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210021311101199 and 210021311101208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021311101211) 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, 29078875 + ... + 35575603.

It is an arithmetic number, because the mean of its divisors is an integer number (30003055557940).

Almost surely, 2^{210021311101231} is an apocalyptic number.

210021311101231 is a deficient number, since it is larger than the sum of its proper divisors (30003133362289).

210021311101231 is an equidigital number, since it uses as much as digits as its factorization.

210021311101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11114913.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 210021311101231 its reverse (132101113120012), we get a palindrome (342122424221243).

The spelling of 210021311101231 in words is "two hundred ten trillion, twenty-one billion, three hundred eleven million, one hundred one thousand, two hundred thirty-one".