1210020516 has 72 divisors (see below), whose sum is σ = 3160597440. Its totient is φ = 390083904.

The previous prime is 1210020467. The next prime is 1210020517. The reversal of 1210020516 is 6150200121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1210020517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155650 + ... + 163238.

Almost surely, 2^1210020516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210020516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1580298720).

1210020516 is an abundant number, since it is smaller than the sum of its proper divisors (1950576924).

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

1210020516 is a wasteful number, since it uses less digits than its factorization.

1210020516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7745 (or 7740 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1210020516 is about 34785.3491573680. The cubic root of 1210020516 is about 1065.6082592933.

Adding to 1210020516 its reverse (6150200121), we get a palindrome (7360220637).

The spelling of 1210020516 in words is "one billion, two hundred ten million, twenty thousand, five hundred sixteen".