2143222042420 has 24 divisors (see below), whose sum is σ = 4504538984904. Its totient is φ = 856570208256.

The previous prime is 2143222042417. The next prime is 2143222042439. The reversal of 2143222042420 is 242402223412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 663305998096 + 1479916044324 = 814436^2 + 1216518^2 .

It is a super-2 number, since 2×2143222042420² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44888589 + ... + 44936308.

It is an arithmetic number, because the mean of its divisors is an integer number (187689124371).

Almost surely, 2^{2143222042420} is an apocalyptic number.

2143222042420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143222042420 is an abundant number, since it is smaller than the sum of its proper divisors (2361316942484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2143222042420 is a wasteful number, since it uses less digits than its factorization.

2143222042420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89826099 (or 89826097 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 2143222042420 its reverse (242402223412), we get a palindrome (2385624265832).

The spelling of 2143222042420 in words is "two trillion, one hundred forty-three billion, two hundred twenty-two million, forty-two thousand, four hundred twenty".