1201101020 has 48 divisors (see below), whose sum is σ = 2895092928. Its totient is φ = 410027520.

The previous prime is 1201101019. The next prime is 1201101029. The reversal of 1201101020 is 201011021.

It is a junction number, because it is equal to n+sod(n) for n = 1201100989 and 1201101007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201101029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14210 + ... + 51030.

It is an arithmetic number, because the mean of its divisors is an integer number (60314436).

Almost surely, 2^1201101020 is an apocalyptic number.

1201101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201101020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1447546464).

1201101020 is an abundant number, since it is smaller than the sum of its proper divisors (1693991908).

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

1201101020 is a wasteful number, since it uses less digits than its factorization.

1201101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37070 (or 37068 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1201101020 is about 34656.9043626230. The cubic root of 1201101020 is about 1062.9834721510.

Adding to 1201101020 its reverse (201011021), we get a palindrome (1402112041).

The spelling of 1201101020 in words is "one billion, two hundred one million, one hundred one thousand, twenty".