1200211100020 has 12 divisors (see below), whose sum is σ = 2520443310084. Its totient is φ = 480084440000.

The previous prime is 1200211099993. The next prime is 1200211100029. The reversal of 1200211100020 is 200011120021.

It can be written as a sum of positive squares in 2 ways, for example, as 160145633124 + 1040065466896 = 400182^2 + 1019836^2 .

It is a super-2 number, since 2×1200211100020² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200211100029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30005277481 + ... + 30005277520.

It is an arithmetic number, because the mean of its divisors is an integer number (210036942507).

Almost surely, 2^{1200211100020} is an apocalyptic number.

1200211100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200211100020 is an abundant number, since it is smaller than the sum of its proper divisors (1320232210064).

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

1200211100020 is a wasteful number, since it uses less digits than its factorization.

1200211100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60010555010 (or 60010555008 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1200211100020 its reverse (200011120021), we get a palindrome (1400222220041).

The spelling of 1200211100020 in words is "one trillion, two hundred billion, two hundred eleven million, one hundred thousand, twenty".