1211330223142 has 16 divisors (see below), whose sum is σ = 1956796339680. Its totient is φ = 559066306752.

The previous prime is 1211330223139. The next prime is 1211330223163. The reversal of 1211330223142 is 2413220331121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385359 + ... + 2083717.

It is an arithmetic number, because the mean of its divisors is an integer number (122299771230).

Almost surely, 2^{1211330223142} is an apocalyptic number.

1211330223142 is a deficient number, since it is larger than the sum of its proper divisors (745466116538).

1211330223142 is a wasteful number, since it uses less digits than its factorization.

1211330223142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765087.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1211330223142 its reverse (2413220331121), we get a palindrome (3624550554263).

The spelling of 1211330223142 in words is "one trillion, two hundred eleven billion, three hundred thirty million, two hundred twenty-three thousand, one hundred forty-two".