1101121989 has 16 divisors (see below), whose sum is σ = 1604435520. Its totient is φ = 666178560.

The previous prime is 1101121951. The next prime is 1101122003. The reversal of 1101121989 is 9891211011.

It is not a de Polignac number, because 1101121989 - 2²¹ = 1099024837 is a prime.

It is a super-2 number, since 2×1101121989² = 2424939269318632242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101121939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9874 + ... + 47955.

It is an arithmetic number, because the mean of its divisors is an integer number (100277220).

Almost surely, 2^1101121989 is an apocalyptic number.

It is an amenable number.

1101121989 is a deficient number, since it is larger than the sum of its proper divisors (503313531).

1101121989 is a wasteful number, since it uses less digits than its factorization.

1101121989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58420.

The product of its (nonzero) digits is 1296, while the sum is 33.

The square root of 1101121989 is about 33183.1582131659. The cubic root of 1101121989 is about 1032.6309679930.

It can be divided in two parts, 110112 and 1989, that added together give a triangular number (112101 = T₄₇₃).

The spelling of 1101121989 in words is "one billion, one hundred one million, one hundred twenty-one thousand, nine hundred eighty-nine".