1120021551 has 48 divisors (see below), whose sum is σ = 1790880000. Its totient is φ = 668891520.

The previous prime is 1120021439. The next prime is 1120021571. The reversal of 1120021551 is 1551200211.

1120021551 is a `hidden beast` number, since 112 + 0 + 0 + 2 + 1 + 551 = 666.

It is not a de Polignac number, because 1120021551 - 2⁷ = 1120021423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120021571) 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 47 ways as a sum of consecutive naturals, for example, 2738235 + ... + 2738643.

It is an arithmetic number, because the mean of its divisors is an integer number (37310000).

Almost surely, 2^1120021551 is an apocalyptic number.

1120021551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1120021551 is a deficient number, since it is larger than the sum of its proper divisors (670858449).

1120021551 is a wasteful number, since it uses less digits than its factorization.

1120021551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 1120021551 is about 33466.7230394612. The cubic root of 1120021551 is about 1038.5054812466.

Adding to 1120021551 its reverse (1551200211), we get a palindrome (2671221762).

The spelling of 1120021551 in words is "one billion, one hundred twenty million, twenty-one thousand, five hundred fifty-one".