1212433402 has 4 divisors (see below), whose sum is σ = 1818650106. Its totient is φ = 606216700.

The previous prime is 1212433399. The next prime is 1212433403. The reversal of 1212433402 is 2043342121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2043342121 = 13799 ⋅148079.

It can be written as a sum of positive squares in only one way, i.e., 1176421401 + 36012001 = 34299^2 + 6001^2 .

It is not an unprimeable number, because it can be changed into a prime (1212433403) 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 as a sum of consecutive naturals, namely, 303108349 + ... + 303108352.

Almost surely, 2^1212433402 is an apocalyptic number.

1212433402 is a deficient number, since it is larger than the sum of its proper divisors (606216704).

1212433402 is an equidigital number, since it uses as much as digits as its factorization.

1212433402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606216703.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1212433402 is about 34820.0143882796. The cubic root of 1212433402 is about 1066.3160941461.

Adding to 1212433402 its reverse (2043342121), we get a palindrome (3255775523).

The spelling of 1212433402 in words is "one billion, two hundred twelve million, four hundred thirty-three thousand, four hundred two".