124200142220221 has 4 divisors (see below), whose sum is σ = 124203395018592. Its totient is φ = 124196889421852.

The previous prime is 124200142220177. The next prime is 124200142220233. The reversal of 124200142220221 is 122022241002421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 124200142220221 - 2¹⁹ = 124200141695933 is a prime.

It is a super-2 number, since 2×124200142220221² (a number of 29 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 (124200143220221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1626341911 + ... + 1626418276.

It is an arithmetic number, because the mean of its divisors is an integer number (31050848754648).

Almost surely, 2^{124200142220221} is an apocalyptic number.

It is an amenable number.

124200142220221 is a deficient number, since it is larger than the sum of its proper divisors (3252798371).

124200142220221 is an equidigital number, since it uses as much as digits as its factorization.

124200142220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252798370.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 124200142220221 its reverse (122022241002421), we get a palindrome (246222383222642).

The spelling of 124200142220221 in words is "one hundred twenty-four trillion, two hundred billion, one hundred forty-two million, two hundred twenty thousand, two hundred twenty-one".