1400121321 has 8 divisors (see below), whose sum is σ = 1868950944. Its totient is φ = 932352960.

The previous prime is 1400121269. The next prime is 1400121367. The reversal of 1400121321 is 1231210041.

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

It is not a de Polignac number, because 1400121321 - 2⁶ = 1400121257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1400121321.

It is not an unprimeable number, because it can be changed into a prime (1400121391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262231 + ... + 267516.

It is an arithmetic number, because the mean of its divisors is an integer number (233618868).

Almost surely, 2^1400121321 is an apocalyptic number.

It is an amenable number.

1400121321 is a deficient number, since it is larger than the sum of its proper divisors (468829623).

1400121321 is an equidigital number, since it uses as much as digits as its factorization.

1400121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530631.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1400121321 is about 37418.1950526746. The cubic root of 1400121321 is about 1118.7212555435.

Adding to 1400121321 its reverse (1231210041), we get a palindrome (2631331362).

The spelling of 1400121321 in words is "one billion, four hundred million, one hundred twenty-one thousand, three hundred twenty-one".