1211303121102 has 24 divisors (see below), whose sum is σ = 2624543045280. Its totient is φ = 403759560960.

The previous prime is 1211303121101. The next prime is 1211303121113. The reversal of 1211303121102 is 2011213031121.

1211303121102 is a `hidden beast` number, since 1 + 211 + 30 + 312 + 110 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211303121101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274299 + ... + 1580457.

It is an arithmetic number, because the mean of its divisors is an integer number (109355960220).

Almost surely, 2^{1211303121102} is an apocalyptic number.

1211303121102 is an abundant number, since it is smaller than the sum of its proper divisors (1413239924178).

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

1211303121102 is a wasteful number, since it uses less digits than its factorization.

1211303121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357688 (or 1357685 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1211303121102 its reverse (2011213031121), we get a palindrome (3222516152223).

The spelling of 1211303121102 in words is "one trillion, two hundred eleven billion, three hundred three million, one hundred twenty-one thousand, one hundred two".