1214431021 has 8 divisors (see below), whose sum is σ = 1228614200. Its totient is φ = 1200303360.

The previous prime is 1214431019. The next prime is 1214431033. The reversal of 1214431021 is 1201344121.

It can be written as a sum of positive squares in 4 ways, for example, as 970634025 + 243796996 = 31155^2 + 15614^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1214431021 - 2¹ = 1214431019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1214431021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214431051) 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, 30961 + ... + 58201.

It is an arithmetic number, because the mean of its divisors is an integer number (153576775).

Almost surely, 2^1214431021 is an apocalyptic number.

It is an amenable number.

1214431021 is a deficient number, since it is larger than the sum of its proper divisors (14183179).

1214431021 is a wasteful number, since it uses less digits than its factorization.

1214431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27759.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1214431021 is about 34848.6875075662. The cubic root of 1214431021 is about 1066.9013976360.

Adding to 1214431021 its reverse (1201344121), we get a palindrome (2415775142).

The spelling of 1214431021 in words is "one billion, two hundred fourteen million, four hundred thirty-one thousand, twenty-one".