121201020421401 has 16 divisors (see below), whose sum is σ = 163348633850688. Its totient is φ = 79930935115200.

The previous prime is 121201020421343. The next prime is 121201020421499. The reversal of 121201020421401 is 104124020102121.

It is not a de Polignac number, because 121201020421401 - 2⁶ = 121201020421337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121201020431401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486310030 + ... + 486559191.

It is an arithmetic number, because the mean of its divisors is an integer number (10209289615668).

Almost surely, 2^{121201020421401} is an apocalyptic number.

It is an amenable number.

121201020421401 is a deficient number, since it is larger than the sum of its proper divisors (42147613429287).

121201020421401 is a wasteful number, since it uses less digits than its factorization.

121201020421401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972869672.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121201020421401 its reverse (104124020102121), we get a palindrome (225325040523522).

The spelling of 121201020421401 in words is "one hundred twenty-one trillion, two hundred one billion, twenty million, four hundred twenty-one thousand, four hundred one".