121221413102 has 4 divisors (see below), whose sum is σ = 181832119656. Its totient is φ = 60610706550.

The previous prime is 121221413101. The next prime is 121221413147. The reversal of 121221413102 is 201314122121.

121221413102 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201314122121 = 7 ⋅28759160303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221413101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30305353274 + ... + 30305353277.

It is an arithmetic number, because the mean of its divisors is an integer number (45458029914).

Almost surely, 2^121221413102 is an apocalyptic number.

121221413102 is a deficient number, since it is larger than the sum of its proper divisors (60610706554).

121221413102 is an equidigital number, since it uses as much as digits as its factorization.

121221413102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60610706553.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121221413102 its reverse (201314122121), we get a palindrome (322535535223).

The spelling of 121221413102 in words is "one hundred twenty-one billion, two hundred twenty-one million, four hundred thirteen thousand, one hundred two".