1212231402 has 48 divisors (see below), whose sum is σ = 2672897760. Its totient is φ = 396972576.

The previous prime is 1212231341. The next prime is 1212231413. The reversal of 1212231402 is 2041322121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 533124 + ... + 535392.

It is an arithmetic number, because the mean of its divisors is an integer number (55685370).

Almost surely, 2^1212231402 is an apocalyptic number.

1212231402 is an abundant number, since it is smaller than the sum of its proper divisors (1460666358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212231402 is a wasteful number, since it uses less digits than its factorization.

1212231402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787 (or 2784 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1212231402 is about 34817.1136368310. The cubic root of 1212231402 is about 1066.2568722502.

Adding to 1212231402 its reverse (2041322121), we get a palindrome (3253553523).

The spelling of 1212231402 in words is "one billion, two hundred twelve million, two hundred thirty-one thousand, four hundred two".