1021212211122 has 80 divisors (see below), whose sum is σ = 2306683523232. Its totient is φ = 337667279040.

The previous prime is 1021212211111. The next prime is 1021212211139. The reversal of 1021212211122 is 2211122121201.

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

It is a junction number, because it is equal to n+sod(n) for n = 1021212211095 and 1021212211104.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 60622833 + ... + 60639675.

Almost surely, 2^{1021212211122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021212211122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153341761616).

1021212211122 is an abundant number, since it is smaller than the sum of its proper divisors (1285471312110).

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

1021212211122 is a wasteful number, since it uses less digits than its factorization.

1021212211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19845 (or 19836 counting only the distinct ones).

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

Adding to 1021212211122 its reverse (2211122121201), we get a palindrome (3232334332323).

The spelling of 1021212211122 in words is "one trillion, twenty-one billion, two hundred twelve million, two hundred eleven thousand, one hundred twenty-two".