1012212122112 has 240 divisors, whose sum is σ = 3207722630112. Its totient is φ = 317556080640.

The previous prime is 1012212122111. The next prime is 1012212122137. The reversal of 1012212122112 is 2112212122101.

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 (1012212122111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1875787 + ... + 2354357.

Almost surely, 2^{1012212122112} is an apocalyptic number.

1012212122112 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 1012212122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603861315056).

1012212122112 is an abundant number, since it is smaller than the sum of its proper divisors (2195510508000).

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

1012212122112 is an frugal number, since it uses more digits than its factorization.

1012212122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478621 (or 478593 counting only the distinct ones).

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

Adding to 1012212122112 its reverse (2112212122101), we get a palindrome (3124424244213).

The spelling of 1012212122112 in words is "one trillion, twelve billion, two hundred twelve million, one hundred twenty-two thousand, one hundred twelve".