121401121110401 has 4 divisors (see below), whose sum is σ = 132437586665904. Its totient is φ = 110364655554900.

The previous prime is 121401121110397. The next prime is 121401121110497. The reversal of 121401121110401 is 104011121104121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121401121110401 - 2² = 121401121110397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121401121110901) 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, 5518232777735 + ... + 5518232777756.

It is an arithmetic number, because the mean of its divisors is an integer number (33109396666476).

Almost surely, 2^{121401121110401} is an apocalyptic number.

121401121110401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121401121110401 is a deficient number, since it is larger than the sum of its proper divisors (11036465555503).

121401121110401 is a wasteful number, since it uses less digits than its factorization.

121401121110401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11036465555502.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 121401121110401 its reverse (104011121104121), we get a palindrome (225412242214522).

The spelling of 121401121110401 in words is "one hundred twenty-one trillion, four hundred one billion, one hundred twenty-one million, one hundred ten thousand, four hundred one".