121420401 has 4 divisors (see below), whose sum is σ = 161893872. Its totient is φ = 80946932.

The previous prime is 121420391. The next prime is 121420501. The reversal of 121420401 is 104024121.

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 121420401 - 2⁶ = 121420337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121420501) 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, 20236731 + ... + 20236736.

It is an arithmetic number, because the mean of its divisors is an integer number (40473468).

Almost surely, 2^121420401 is an apocalyptic number.

It is an amenable number.

121420401 is a deficient number, since it is larger than the sum of its proper divisors (40473471).

121420401 is an equidigital number, since it uses as much as digits as its factorization.

121420401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40473470.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 121420401 is about 11019.0925669948. The cubic root of 121420401 is about 495.1809031678.

Adding to 121420401 its reverse (104024121), we get a palindrome (225444522).

The spelling of 121420401 in words is "one hundred twenty-one million, four hundred twenty thousand, four hundred one".