1221014402 has 8 divisors (see below), whose sum is σ = 1832068476. Its totient is φ = 610324912.

The previous prime is 1221014401. The next prime is 1221014419. The reversal of 1221014402 is 2044101221.

It can be written as a sum of positive squares in 2 ways, for example, as 1139130001 + 81884401 = 33751^2 + 9049^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1221014401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82613 + ... + 96264.

Almost surely, 2^1221014402 is an apocalyptic number.

1221014402 is a deficient number, since it is larger than the sum of its proper divisors (611054074).

1221014402 is a wasteful number, since it uses less digits than its factorization.

1221014402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182292.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1221014402 is about 34943.0164982933. The cubic root of 1221014402 is about 1068.8258007544.

Adding to 1221014402 its reverse (2044101221), we get a palindrome (3265115623).

The spelling of 1221014402 in words is "one billion, two hundred twenty-one million, fourteen thousand, four hundred two".