1121002120 has 32 divisors (see below), whose sum is σ = 2882577600. Its totient is φ = 384343488.

The previous prime is 1121002097. The next prime is 1121002121. The reversal of 1121002120 is 212001211.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1121002097 and 1121002106.

It is not an unprimeable number, because it can be changed into a prime (1121002121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2001510 + ... + 2002069.

It is an arithmetic number, because the mean of its divisors is an integer number (90080550).

Almost surely, 2^1121002120 is an apocalyptic number.

1121002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121002120 is an abundant number, since it is smaller than the sum of its proper divisors (1761575480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121002120 is a wasteful number, since it uses less digits than its factorization.

1121002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003597 (or 4003593 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1121002120 is about 33481.3697449791. The cubic root of 1121002120 is about 1038.8084603116.

Adding to 1121002120 its reverse (212001211), we get a palindrome (1333003331).

Subtracting from 1121002120 its reverse (212001211), we obtain a palindrome (909000909).

The spelling of 1121002120 in words is "one billion, one hundred twenty-one million, two thousand, one hundred twenty".