1211102140242 has 16 divisors (see below), whose sum is σ = 2422236258432. Its totient is φ = 403695383760.

The previous prime is 1211102140217. The next prime is 1211102140253. The reversal of 1211102140242 is 2420412011121.

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, 825213 + ... + 1761584.

It is an arithmetic number, because the mean of its divisors is an integer number (151389766152).

Almost surely, 2^{1211102140242} is an apocalyptic number.

1211102140242 is an abundant number, since it is smaller than the sum of its proper divisors (1211134118190).

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

1211102140242 is a wasteful number, since it uses less digits than its factorization.

1211102140242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664833.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 1211102140242 its reverse (2420412011121), we get a palindrome (3631514151363).

The spelling of 1211102140242 in words is "one trillion, two hundred eleven billion, one hundred two million, one hundred forty thousand, two hundred forty-two".