1211241243102 has 64 divisors (see below), whose sum is σ = 2667122228736. Its totient is φ = 363654466560.

The previous prime is 1211241243067. The next prime is 1211241243167. The reversal of 1211241243102 is 2013421421121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20203623 + ... + 20263485.

It is an arithmetic number, because the mean of its divisors is an integer number (41673784824).

Almost surely, 2^{1211241243102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211241243102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1333561114368).

1211241243102 is an abundant number, since it is smaller than the sum of its proper divisors (1455880985634).

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

1211241243102 is a wasteful number, since it uses less digits than its factorization.

1211241243102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62705.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 1211241243102 its reverse (2013421421121), we get a palindrome (3224662664223).

It can be divided in two parts, 12112 and 41243102, that added together give a palindrome (41255214).

The spelling of 1211241243102 in words is "one trillion, two hundred eleven billion, two hundred forty-one million, two hundred forty-three thousand, one hundred two".