1210000030020 has 72 divisors (see below), whose sum is σ = 3670669242240. Its totient is φ = 322637152320.

The previous prime is 1210000030003. The next prime is 1210000030027. The reversal of 1210000030020 is 200300000121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1210000029984 and 1210000030011.

It is not an unprimeable number, because it can be changed into a prime (1210000030027) 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, 1701621 + ... + 2305539.

Almost surely, 2^{1210000030020} is an apocalyptic number.

1210000030020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210000030020 is an abundant number, since it is smaller than the sum of its proper divisors (2460669212220).

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

1210000030020 is a wasteful number, since it uses less digits than its factorization.

1210000030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615065 (or 615060 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 1210000030020 its reverse (200300000121), we get a palindrome (1410300030141).

The spelling of 1210000030020 in words is "one trillion, two hundred ten billion, thirty thousand, twenty".