1201131020 has 12 divisors (see below), whose sum is σ = 2522375184. Its totient is φ = 480452400.

The previous prime is 1201130989. The next prime is 1201131031. The reversal of 1201131020 is 201311021.

It is a junction number, because it is equal to n+sod(n) for n = 1201130992 and 1201131010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30028256 + ... + 30028295.

It is an arithmetic number, because the mean of its divisors is an integer number (210197932).

Almost surely, 2^1201131020 is an apocalyptic number.

1201131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201131020 is an abundant number, since it is smaller than the sum of its proper divisors (1321244164).

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

1201131020 is a wasteful number, since it uses less digits than its factorization.

1201131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60056560 (or 60056558 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1201131020 is about 34657.3371741108. The cubic root of 1201131020 is about 1062.9923221528.

Adding to 1201131020 its reverse (201311021), we get a palindrome (1402442041).

The spelling of 1201131020 in words is "one billion, two hundred one million, one hundred thirty-one thousand, twenty".