1021530212004 has 48 divisors (see below), whose sum is σ = 2494164861440. Its totient is φ = 325011813120.

The previous prime is 1021530211991. The next prime is 1021530212009. The reversal of 1021530212004 is 4002120351201.

It is not an unprimeable number, because it can be changed into a prime (1021530212009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18781399 + ... + 18835710.

Almost surely, 2^{1021530212004} is an apocalyptic number.

It is an amenable number.

1021530212004 is an abundant number, since it is smaller than the sum of its proper divisors (1472634649436).

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

1021530212004 is a wasteful number, since it uses less digits than its factorization.

1021530212004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37617220 (or 37617218 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 1021530212004 its reverse (4002120351201), we get a palindrome (5023650563205).

The spelling of 1021530212004 in words is "one trillion, twenty-one billion, five hundred thirty million, two hundred twelve thousand, four".