1242051111 has 32 divisors (see below), whose sum is σ = 2107238400. Its totient is φ = 708294240.

The previous prime is 1242051101. The next prime is 1242051133. The reversal of 1242051111 is 1111502421.

1242051111 is a `hidden beast` number, since 124 + 20 + 511 + 11 = 666.

It is not a de Polignac number, because 1242051111 - 2⁶ = 1242051047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242051101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89746 + ... + 102656.

It is an arithmetic number, because the mean of its divisors is an integer number (65851200).

Almost surely, 2^1242051111 is an apocalyptic number.

1242051111 is a deficient number, since it is larger than the sum of its proper divisors (865187289).

1242051111 is a wasteful number, since it uses less digits than its factorization.

1242051111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436 (or 13430 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1242051111 is about 35242.7455088278. The cubic root of 1242051111 is about 1074.9291061234.

Adding to 1242051111 its reverse (1111502421), we get a palindrome (2353553532).

It can be divided in two parts, 124205 and 1111, that added together give a square (125316 = 354²).

The spelling of 1242051111 in words is "one billion, two hundred forty-two million, fifty-one thousand, one hundred eleven".