121221223021401 has 8 divisors (see below), whose sum is σ = 161761544108160. Its totient is φ = 80747525307792.

The previous prime is 121221223021399. The next prime is 121221223021433. The reversal of 121221223021401 is 104120322122121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121221223021401 - 2¹ = 121221223021399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221223021471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16655839041 + ... + 16655846318.

It is an arithmetic number, because the mean of its divisors is an integer number (20220193013520).

Almost surely, 2^{121221223021401} is an apocalyptic number.

It is an amenable number.

121221223021401 is a deficient number, since it is larger than the sum of its proper divisors (40540321086759).

121221223021401 is a wasteful number, since it uses less digits than its factorization.

121221223021401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33311686575.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 121221223021401 its reverse (104120322122121), we get a palindrome (225341545143522).

The spelling of 121221223021401 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-three million, twenty-one thousand, four hundred one".