121400305105 has 48 divisors (see below), whose sum is σ = 156343509504. Its totient is φ = 90284163200.

The previous prime is 121400305057. The next prime is 121400305111. The reversal of 121400305105 is 501503004121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-121400305105 is a prime.

It is a super-2 number, since 2×121400305105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 173181255 + ... + 173181955.

It is an arithmetic number, because the mean of its divisors is an integer number (3257156448).

Almost surely, 2^121400305105 is an apocalyptic number.

It is an amenable number.

121400305105 is a deficient number, since it is larger than the sum of its proper divisors (34943204399).

121400305105 is an equidigital number, since it uses as much as digits as its factorization.

121400305105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 121400305105 its reverse (501503004121), we get a palindrome (622903309226).

The spelling of 121400305105 in words is "one hundred twenty-one billion, four hundred million, three hundred five thousand, one hundred five".