121221223021403 has 8 divisors (see below), whose sum is σ = 121232192182080. Its totient is φ = 121210254289800.

The previous prime is 121221223021399. The next prime is 121221223021433. The reversal of 121221223021403 is 304120322122121.

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

It is a cyclic number.

It is not a de Polignac number, because 121221223021403 - 2² = 121221223021399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221223021433) 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, 839532068 + ... + 839676446.

It is an arithmetic number, because the mean of its divisors is an integer number (15154024022760).

Almost surely, 2^{121221223021403} is an apocalyptic number.

121221223021403 is a deficient number, since it is larger than the sum of its proper divisors (10969160677).

121221223021403 is a wasteful number, since it uses less digits than its factorization.

121221223021403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214537.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 121221223021403 its reverse (304120322122121), we get a palindrome (425341545143524).

The spelling of 121221223021403 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-three million, twenty-one thousand, four hundred three".