1211002212168 has 128 divisors (see below), whose sum is σ = 3878473708800. Its totient is φ = 342938631168.

The previous prime is 1211002212163. The next prime is 1211002212169. The reversal of 1211002212168 is 8612122001121.

1211002212168 is a `hidden beast` number, since 121 + 100 + 221 + 216 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1211002212163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3373071 + ... + 3714782.

It is an arithmetic number, because the mean of its divisors is an integer number (30300575850).

Almost surely, 2^{1211002212168} is an apocalyptic number.

1211002212168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1211002212168 is an abundant number, since it is smaller than the sum of its proper divisors (2667471496632).

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

1211002212168 is a wasteful number, since it uses less digits than its factorization.

1211002212168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7087988 (or 7087978 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

Adding to 1211002212168 its reverse (8612122001121), we get a palindrome (9823124213289).

The spelling of 1211002212168 in words is "one trillion, two hundred eleven billion, two million, two hundred twelve thousand, one hundred sixty-eight".