1121210120 has 32 divisors (see below), whose sum is σ = 2525472000. Its totient is φ = 447995328.

The previous prime is 1121210117. The next prime is 1121210137. The reversal of 1121210120 is 210121211.

It is a super-2 number, since 2×1121210120² = 2514224266380828800, which contains 22 as substring.

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, 23081 + ... + 52679.

It is an arithmetic number, because the mean of its divisors is an integer number (78921000).

Almost surely, 2^1121210120 is an apocalyptic number.

1121210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121210120 is an abundant number, since it is smaller than the sum of its proper divisors (1404261880).

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

1121210120 is a wasteful number, since it uses less digits than its factorization.

1121210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30557 (or 30553 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1121210120 is about 33484.4758059612. The cubic root of 1121210120 is about 1038.8727060412.

Adding to 1121210120 its reverse (210121211), we get a palindrome (1331331331).

The spelling of 1121210120 in words is "one billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty".