1211021110002 has 256 divisors, whose sum is σ = 2888352276480. Its totient is φ = 334604390400.

The previous prime is 1211021109901. The next prime is 1211021110037. The reversal of 1211021110002 is 2000111201121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211021110002.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 765015703 + ... + 765017285.

It is an arithmetic number, because the mean of its divisors is an integer number (11282626080).

Almost surely, 2^{1211021110002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211021110002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444176138240).

1211021110002 is an abundant number, since it is smaller than the sum of its proper divisors (1677331166478).

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

1211021110002 is a wasteful number, since it uses less digits than its factorization.

1211021110002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1211021110002 its reverse (2000111201121), we get a palindrome (3211132311123).

It can be divided in two parts, 12110 and 21110002, that added together give a palindrome (21122112).

The spelling of 1211021110002 in words is "one trillion, two hundred eleven billion, twenty-one million, one hundred ten thousand, two".