121003402111423 has 4 divisors (see below), whose sum is σ = 130311356120008. Its totient is φ = 111695448102840.

The previous prime is 121003402111379. The next prime is 121003402111463. The reversal of 121003402111423 is 324111204300121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121003402111423 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 (121003402111463) 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, 4653977004273 + ... + 4653977004298.

It is an arithmetic number, because the mean of its divisors is an integer number (32577839030002).

Almost surely, 2^{121003402111423} is an apocalyptic number.

121003402111423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121003402111423 is a deficient number, since it is larger than the sum of its proper divisors (9307954008585).

121003402111423 is an equidigital number, since it uses as much as digits as its factorization.

121003402111423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9307954008584.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 121003402111423 its reverse (324111204300121), we get a palindrome (445114606411544).

The spelling of 121003402111423 in words is "one hundred twenty-one trillion, three billion, four hundred two million, one hundred eleven thousand, four hundred twenty-three".