1210020020 has 48 divisors (see below), whose sum is σ = 2792059200. Its totient is φ = 436830720.

The previous prime is 1210020013. The next prime is 1210020061. The reversal of 1210020020 is 200200121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10796 + ... + 50364.

It is an arithmetic number, because the mean of its divisors is an integer number (58167900).

Almost surely, 2^1210020020 is an apocalyptic number.

1210020020 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 1210020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1396029600).

1210020020 is an abundant number, since it is smaller than the sum of its proper divisors (1582039180).

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

1210020020 is a wasteful number, since it uses less digits than its factorization.

1210020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39728 (or 39726 counting only the distinct ones).

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

The square root of 1210020020 is about 34785.3420279289. The cubic root of 1210020020 is about 1065.6081136920.

Adding to 1210020020 its reverse (200200121), we get a palindrome (1410220141).

The spelling of 1210020020 in words is "one billion, two hundred ten million, twenty thousand, twenty".