1213244002 has 4 divisors (see below), whose sum is σ = 1819866006. Its totient is φ = 606622000.

The previous prime is 1213243961. The next prime is 1213244009. The reversal of 1213244002 is 2004423121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2004423121 = 67 ⋅29916763.

It can be written as a sum of positive squares in only one way, i.e., 1113623641 + 99620361 = 33371^2 + 9981^2 .

It is a super-2 number, since 2×1213244002² = 2943922016777952008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213244009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303310999 + ... + 303311002.

Almost surely, 2^1213244002 is an apocalyptic number.

1213244002 is a deficient number, since it is larger than the sum of its proper divisors (606622004).

1213244002 is an equidigital number, since it uses as much as digits as its factorization.

1213244002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606622003.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1213244002 is about 34831.6523007451. The cubic root of 1213244002 is about 1066.5536778539.

Adding to 1213244002 its reverse (2004423121), we get a palindrome (3217667123).

The spelling of 1213244002 in words is "one billion, two hundred thirteen million, two hundred forty-four thousand, two".