122121403224221 has 4 divisors (see below), whose sum is σ = 128548845499200. Its totient is φ = 115693960949244.

The previous prime is 122121403224209. The next prime is 122121403224263. The reversal of 122121403224221 is 122422304121221.

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 122121403224221 - 2²⁶ = 122121336115357 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 (122121403224521) 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, 3213721137461 + ... + 3213721137498.

It is an arithmetic number, because the mean of its divisors is an integer number (32137211374800).

Almost surely, 2^{122121403224221} is an apocalyptic number.

It is an amenable number.

122121403224221 is a deficient number, since it is larger than the sum of its proper divisors (6427442274979).

122121403224221 is an equidigital number, since it uses as much as digits as its factorization.

122121403224221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427442274978.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 122121403224221 its reverse (122422304121221), we get a palindrome (244543707345442).

The spelling of 122121403224221 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, four hundred three million, two hundred twenty-four thousand, two hundred twenty-one".