1021224213204 has 96 divisors (see below), whose sum is σ = 2679173812224. Its totient is φ = 300398355840.

The previous prime is 1021224213187. The next prime is 1021224213209. The reversal of 1021224213204 is 4023124221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021224213209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6637087 + ... + 6789209.

It is an arithmetic number, because the mean of its divisors is an integer number (27908060544).

Almost surely, 2^{1021224213204} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021224213204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339586906112).

1021224213204 is an abundant number, since it is smaller than the sum of its proper divisors (1657949599020).

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

1021224213204 is a wasteful number, since it uses less digits than its factorization.

1021224213204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154037 (or 154035 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1021224213204 its reverse (4023124221201), we get a palindrome (5044348434405).

The spelling of 1021224213204 in words is "one trillion, twenty-one billion, two hundred twenty-four million, two hundred thirteen thousand, two hundred four".