1212211022112 has 36 divisors (see below), whose sum is σ = 3447225094950. Its totient is φ = 404070340608.

The previous prime is 1212211022101. The next prime is 1212211022123. The reversal of 1212211022112 is 2112201122121.

It is an interprime number because it is at equal distance from previous prime (1212211022101) and next prime (1212211022123).

It can be written as a sum of positive squares in only one way, i.e., 1117595722896 + 94615299216 = 1057164^2 + 307596^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2104532737 + ... + 2104533312.

Almost surely, 2^{1212211022112} is an apocalyptic number.

1212211022112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212211022112 is an abundant number, since it is smaller than the sum of its proper divisors (2235014072838).

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

1212211022112 is a wasteful number, since it uses less digits than its factorization.

1212211022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4209066065 (or 4209066054 counting only the distinct ones).

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

Adding to 1212211022112 its reverse (2112201122121), we get a palindrome (3324412144233).

The spelling of 1212211022112 in words is "one trillion, two hundred twelve billion, two hundred eleven million, twenty-two thousand, one hundred twelve".