1211144022102 has 64 divisors (see below), whose sum is σ = 2931317351424. Its totient is φ = 325669647360.

The previous prime is 1211144022091. The next prime is 1211144022133. The reversal of 1211144022102 is 2012204411121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 23994463 + ... + 24044885.

It is an arithmetic number, because the mean of its divisors is an integer number (45801833616).

Almost surely, 2^{1211144022102} is an apocalyptic number.

1211144022102 is an abundant number, since it is smaller than the sum of its proper divisors (1720173329322).

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

1211144022102 is a wasteful number, since it uses less digits than its factorization.

1211144022102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84093.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 1211144022102 its reverse (2012204411121), we get a palindrome (3223348433223).

The spelling of 1211144022102 in words is "one trillion, two hundred eleven billion, one hundred forty-four million, twenty-two thousand, one hundred two".