1200020211020 has 24 divisors (see below), whose sum is σ = 2522413176864. Its totient is φ = 479556516096.

The previous prime is 1200020211007. The next prime is 1200020211031. The reversal of 1200020211020 is 201120200021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1200020210992 and 1200020211010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28201229 + ... + 28243748.

It is an arithmetic number, because the mean of its divisors is an integer number (105100549036).

Almost surely, 2^{1200020211020} is an apocalyptic number.

1200020211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200020211020 is an abundant number, since it is smaller than the sum of its proper divisors (1322392965844).

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

1200020211020 is a wasteful number, since it uses less digits than its factorization.

1200020211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56446049 (or 56446047 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1200020211020 its reverse (201120200021), we get a palindrome (1401140411041).

The spelling of 1200020211020 in words is "one trillion, two hundred billion, twenty million, two hundred eleven thousand, twenty".