1212111112102 has 16 divisors (see below), whose sum is σ = 2029581398592. Its totient is φ = 538146582120.

The previous prime is 1212111112061. The next prime is 1212111112127. The reversal of 1212111112102 is 2012111112121.

It is a super-2 number, since 2×1212111112102² (a number of 25 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 640649748 + ... + 640651639.

It is an arithmetic number, because the mean of its divisors is an integer number (126848837412).

Almost surely, 2^{1212111112102} is an apocalyptic number.

1212111112102 is a deficient number, since it is larger than the sum of its proper divisors (817470286490).

1212111112102 is a wasteful number, since it uses less digits than its factorization.

1212111112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281301443.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1212111112102 its reverse (2012111112121), we get a palindrome (3224222224223).

The spelling of 1212111112102 in words is "one trillion, two hundred twelve billion, one hundred eleven million, one hundred twelve thousand, one hundred two".