20412121143 has 4 divisors (see below), whose sum is σ = 27216161528. Its totient is φ = 13608080760.

The previous prime is 20412121141. The next prime is 20412121181. The reversal of 20412121143 is 34112121402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20412121143 - 2¹ = 20412121141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20412121141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3402020188 + ... + 3402020193.

It is an arithmetic number, because the mean of its divisors is an integer number (6804040382).

Almost surely, 2^20412121143 is an apocalyptic number.

20412121143 is a deficient number, since it is larger than the sum of its proper divisors (6804040385).

20412121143 is an equidigital number, since it uses as much as digits as its factorization.

20412121143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804040384.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20412121143 its reverse (34112121402), we get a palindrome (54524242545).

The spelling of 20412121143 in words is "twenty billion, four hundred twelve million, one hundred twenty-one thousand, one hundred forty-three".