21101214122143 has 8 divisors (see below), whose sum is σ = 21321355919360. Its totient is φ = 20881125457920.

The previous prime is 21101214122137. The next prime is 21101214122179. The reversal of 21101214122143 is 34122141210112.

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 21101214122143 - 2¹³ = 21101214113951 is a prime.

It is a super-2 number, since 2×21101214122143² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101214125143) 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, 12484578 + ... + 14073631.

It is an arithmetic number, because the mean of its divisors is an integer number (2665169489920).

Almost surely, 2^{21101214122143} is an apocalyptic number.

21101214122143 is a deficient number, since it is larger than the sum of its proper divisors (220141797217).

21101214122143 is an equidigital number, since it uses as much as digits as its factorization.

21101214122143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26566497.

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 21101214122143 its reverse (34122141210112), we get a palindrome (55223355332255).

The spelling of 21101214122143 in words is "twenty-one trillion, one hundred one billion, two hundred fourteen million, one hundred twenty-two thousand, one hundred forty-three".