611121111142 has 4 divisors (see below), whose sum is σ = 916681666716. Its totient is φ = 305560555570.

The previous prime is 611121111137. The next prime is 611121111143. The reversal of 611121111142 is 241111121116.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611121111143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152780277784 + ... + 152780277787.

It is an arithmetic number, because the mean of its divisors is an integer number (229170416679).

Almost surely, 2^611121111142 is an apocalyptic number.

611121111142 is a deficient number, since it is larger than the sum of its proper divisors (305560555574).

611121111142 is a wasteful number, since it uses less digits than its factorization.

611121111142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305560555573.

The product of its digits is 96, while the sum is 22.

Adding to 611121111142 its reverse (241111121116), we get a palindrome (852232232258).

The spelling of 611121111142 in words is "six hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred forty-two".