21141220210243 has 32 divisors (see below), whose sum is σ = 25171224422400. Its totient is φ = 17380119456000.

The previous prime is 21141220210217. The next prime is 21141220210277. The reversal of 21141220210243 is 34201202214112.

It is not a de Polignac number, because 21141220210243 - 2⁵ = 21141220210211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21141220210843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5625178 + ... + 8597968.

It is an arithmetic number, because the mean of its divisors is an integer number (786600763200).

Almost surely, 2^{21141220210243} is an apocalyptic number.

21141220210243 is a deficient number, since it is larger than the sum of its proper divisors (4030004212157).

21141220210243 is a wasteful number, since it uses less digits than its factorization.

21141220210243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973259.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21141220210243 its reverse (34201202214112), we get a palindrome (55342422424355).

The spelling of 21141220210243 in words is "twenty-one trillion, one hundred forty-one billion, two hundred twenty million, two hundred ten thousand, two hundred forty-three".