124203021222121 has 4 divisors (see below), whose sum is σ = 124759985443072. Its totient is φ = 123646057001172.

The previous prime is 124203021222089. The next prime is 124203021222143. The reversal of 124203021222121 is 121222120302421.

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 124203021222121 - 2⁵ = 124203021222089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124203021225121) 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, 278482110141 + ... + 278482110586.

It is an arithmetic number, because the mean of its divisors is an integer number (31189996360768).

Almost surely, 2^{124203021222121} is an apocalyptic number.

It is an amenable number.

124203021222121 is a deficient number, since it is larger than the sum of its proper divisors (556964220951).

124203021222121 is an equidigital number, since it uses as much as digits as its factorization.

124203021222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556964220950.

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

Adding to 124203021222121 its reverse (121222120302421), we get a palindrome (245425141524542).

The spelling of 124203021222121 in words is "one hundred twenty-four trillion, two hundred three billion, twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".