1121299642 has 16 divisors (see below), whose sum is σ = 1691975232. Its totient is φ = 557316000.

The previous prime is 1121299639. The next prime is 1121299681. The reversal of 1121299642 is 2469921211.

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, 372142 + ... + 375142.

It is an arithmetic number, because the mean of its divisors is an integer number (105748452).

Almost surely, 2^1121299642 is an apocalyptic number.

1121299642 is a deficient number, since it is larger than the sum of its proper divisors (570675590).

1121299642 is a wasteful number, since it uses less digits than its factorization.

1121299642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053.

The product of its digits is 15552, while the sum is 37.

The square root of 1121299642 is about 33485.8125480031. The cubic root of 1121299642 is about 1038.9003545868.

It can be divided in two parts, 112129 and 9642, that added together give a triangular number (121771 = T₄₉₃).

The spelling of 1121299642 in words is "one billion, one hundred twenty-one million, two hundred ninety-nine thousand, six hundred forty-two".