1012200001020 has 72 divisors (see below), whose sum is σ = 3306520010976. Its totient is φ = 249156922752.

The previous prime is 1012200001013. The next prime is 1012200001103. The reversal of 1012200001020 is 201000022101.

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 = 1012200000993 and 1012200001011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216279712 + ... + 216284391.

Almost surely, 2^{1012200001020} is an apocalyptic number.

1012200001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012200001020 is an abundant number, since it is smaller than the sum of its proper divisors (2294320009956).

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

1012200001020 is a wasteful number, since it uses less digits than its factorization.

1012200001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432564131 (or 432564126 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1012200001020 its reverse (201000022101), we get a palindrome (1213200023121).

The spelling of 1012200001020 in words is "one trillion, twelve billion, two hundred million, one thousand, twenty".