1211001200010 has 48 divisors (see below), whose sum is σ = 3598403567616. Its totient is φ = 276800274144.

The previous prime is 1211001199999. The next prime is 1211001200023. The reversal of 1211001200010 is 100021001121.

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 = 1211001199965 and 1211001200001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 961111434 + ... + 961112693.

It is an arithmetic number, because the mean of its divisors is an integer number (74966740992).

Almost surely, 2^{1211001200010} is an apocalyptic number.

1211001200010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211001200010 is an abundant number, since it is smaller than the sum of its proper divisors (2387402367606).

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

1211001200010 is a wasteful number, since it uses less digits than its factorization.

1211001200010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922224147 (or 1922224144 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1211001200010 its reverse (100021001121), we get a palindrome (1311022201131).

The spelling of 1211001200010 in words is "one trillion, two hundred eleven billion, one million, two hundred thousand, ten".