121225401 has 24 divisors (see below), whose sum is σ = 193336416. Its totient is φ = 72579840.

The previous prime is 121225399. The next prime is 121225411. The reversal of 121225401 is 104522121.

121225401 is a `hidden beast` number, since 1 + 2 + 122 + 540 + 1 = 666.

It is not a de Polignac number, because 121225401 - 2¹ = 121225399 is a prime.

It is a super-2 number, since 2×121225401² = 29391195695221602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121225411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 841 + ... + 15593.

It is an arithmetic number, because the mean of its divisors is an integer number (8055684).

Almost surely, 2^121225401 is an apocalyptic number.

121225401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121225401 is a deficient number, since it is larger than the sum of its proper divisors (72111015).

121225401 is a wasteful number, since it uses less digits than its factorization.

121225401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14853 (or 14850 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 121225401 is about 11010.2407330630. The cubic root of 121225401 is about 494.9156758717.

Adding to 121225401 its reverse (104522121), we get a palindrome (225747522).

It can be divided in two parts, 121 and 225401, that added together give a palindrome (225522).

The spelling of 121225401 in words is "one hundred twenty-one million, two hundred twenty-five thousand, four hundred one".