1131213244402 has 4 divisors (see below), whose sum is σ = 1696819866606. Its totient is φ = 565606622200.

The previous prime is 1131213244387. The next prime is 1131213244409. The reversal of 1131213244402 is 2044423121311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 883188327961 + 248024916441 = 939781^2 + 498021^2 .

It is not an unprimeable number, because it can be changed into a prime (1131213244409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282803311099 + ... + 282803311102.

Almost surely, 2^{1131213244402} is an apocalyptic number.

1131213244402 is a deficient number, since it is larger than the sum of its proper divisors (565606622204).

1131213244402 is an equidigital number, since it uses as much as digits as its factorization.

1131213244402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565606622203.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 1131213244402 its reverse (2044423121311), we get a palindrome (3175636365713).

The spelling of 1131213244402 in words is "one trillion, one hundred thirty-one billion, two hundred thirteen million, two hundred forty-four thousand, four hundred two".