1401121221 has 8 divisors (see below), whose sum is σ = 1875914304. Its totient is φ = 930204480.

The previous prime is 1401121177. The next prime is 1401121273. The reversal of 1401121221 is 1221211041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1401121221 - 2⁷ = 1401121093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1401121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401121021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 968241 + ... + 969686.

It is an arithmetic number, because the mean of its divisors is an integer number (234489288).

Almost surely, 2^1401121221 is an apocalyptic number.

It is an amenable number.

1401121221 is a deficient number, since it is larger than the sum of its proper divisors (474793083).

1401121221 is a wasteful number, since it uses less digits than its factorization.

1401121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938171.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1401121221 is about 37431.5538149300. The cubic root of 1401121221 is about 1118.9875046622.

Adding to 1401121221 its reverse (1221211041), we get a palindrome (2622332262).

The spelling of 1401121221 in words is "one billion, four hundred one million, one hundred twenty-one thousand, two hundred twenty-one".