121276401 has 32 divisors (see below), whose sum is σ = 174569472. Its totient is φ = 74701440.

The previous prime is 121276399. The next prime is 121276427. The reversal of 121276401 is 104672121.

It is not a de Polignac number, because 121276401 - 2¹ = 121276399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121276451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 460996 + ... + 461258.

It is an arithmetic number, because the mean of its divisors is an integer number (5455296).

Almost surely, 2^121276401 is an apocalyptic number.

It is an amenable number.

121276401 is a deficient number, since it is larger than the sum of its proper divisors (53293071).

121276401 is a wasteful number, since it uses less digits than its factorization.

121276401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 121276401 is about 11012.5565151785. The cubic root of 121276401 is about 494.9850704609.

It can be divided in two parts, 12127 and 6401, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 121276401 in words is "one hundred twenty-one million, two hundred seventy-six thousand, four hundred one".