1231213202 has 16 divisors (see below), whose sum is σ = 1979020512. Its totient is φ = 572412480.

The previous prime is 1231213189. The next prime is 1231213213. The reversal of 1231213202 is 2023121321.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 215324 + ... + 220967.

It is an arithmetic number, because the mean of its divisors is an integer number (123688782).

Almost surely, 2^1231213202 is an apocalyptic number.

1231213202 is a deficient number, since it is larger than the sum of its proper divisors (747807310).

1231213202 is a wasteful number, since it uses less digits than its factorization.

1231213202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436393.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1231213202 is about 35088.6477653386. The cubic root of 1231213202 is about 1071.7934234987.

Adding to 1231213202 its reverse (2023121321), we get a palindrome (3254334523).

The spelling of 1231213202 in words is "one billion, two hundred thirty-one million, two hundred thirteen thousand, two hundred two".