1201102120 has 32 divisors (see below), whose sum is σ = 2709124200. Its totient is φ = 479259648.

The previous prime is 1201102109. The next prime is 1201102129. The reversal of 1201102120 is 212011021.

It can be written as a sum of positive squares in 4 ways, for example, as 1197575236 + 3526884 = 34606^2 + 1878^2 .

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 = 1201102097 and 1201102106.

It is not an unprimeable number, because it can be changed into a prime (1201102129) 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, 20349 + ... + 53068.

Almost surely, 2^1201102120 is an apocalyptic number.

1201102120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201102120 is an abundant number, since it is smaller than the sum of its proper divisors (1508022080).

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

1201102120 is a wasteful number, since it uses less digits than its factorization.

1201102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73837 (or 73833 counting only the distinct ones).

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

The square root of 1201102120 is about 34656.9202324731. The cubic root of 1201102120 is about 1062.9837966536.

Adding to 1201102120 its reverse (212011021), we get a palindrome (1413113141).

The spelling of 1201102120 in words is "one billion, two hundred one million, one hundred two thousand, one hundred twenty".