1021221113004 has 18 divisors (see below), whose sum is σ = 2581420035740. Its totient is φ = 340407037656.

The previous prime is 1021221112997. The next prime is 1021221113039. The reversal of 1021221113004 is 4003111221201.

1021221113004 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

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, 14183626534 + ... + 14183626605.

Almost surely, 2^{1021221113004} is an apocalyptic number.

It is an amenable number.

1021221113004 is an abundant number, since it is smaller than the sum of its proper divisors (1560198922736).

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

1021221113004 is a wasteful number, since it uses less digits than its factorization.

1021221113004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28367253149 (or 28367253144 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1021221113004 its reverse (4003111221201), we get a palindrome (5024332334205).

It can be divided in two parts, 1021221 and 113004, that added together give a square (1134225 = 1065²).

The spelling of 1021221113004 in words is "one trillion, twenty-one billion, two hundred twenty-one million, one hundred thirteen thousand, four".