1212212211012 has 240 divisors, whose sum is σ = 3473648640000. Its totient is φ = 365578453440.

The previous prime is 1212212210983. The next prime is 1212212211017. The reversal of 1212212211012 is 2101122122121.

1212212211012 is a `hidden beast` number, since 121 + 221 + 221 + 101 + 2 = 666.

It is a super-2 number, since 2×1212212211012² (a number of 25 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1212212211017) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 851870133 + ... + 851871555.

It is an arithmetic number, because the mean of its divisors is an integer number (14473536000).

Almost surely, 2^{1212212211012} is an apocalyptic number.

1212212211012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212212211012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1736824320000).

1212212211012 is an abundant number, since it is smaller than the sum of its proper divisors (2261436428988).

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

1212212211012 is a wasteful number, since it uses less digits than its factorization.

1212212211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428 (or 2417 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212212211012 its reverse (2101122122121), we get a palindrome (3313334333133).

The spelling of 1212212211012 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred eleven thousand, twelve".