1021020220332 has 96 divisors (see below), whose sum is σ = 3027848947200. Its totient is φ = 291468977856.

The previous prime is 1021020220313. The next prime is 1021020220349. The reversal of 1021020220332 is 2330220201201.

1021020220332 is a `hidden beast` number, since 10 + 2 + 102 + 0 + 220 + 332 = 666.

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 31 ways as a sum of consecutive naturals, for example, 298594 + ... + 1459862.

It is an arithmetic number, because the mean of its divisors is an integer number (31540093200).

Almost surely, 2^{1021020220332} is an apocalyptic number.

1021020220332 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 1021020220332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1513924473600).

1021020220332 is an abundant number, since it is smaller than the sum of its proper divisors (2006828726868).

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

1021020220332 is a wasteful number, since it uses less digits than its factorization.

1021020220332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162452 (or 1162444 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1021020220332 its reverse (2330220201201), we get a palindrome (3351240421533).

The spelling of 1021020220332 in words is "one trillion, twenty-one billion, twenty million, two hundred twenty thousand, three hundred thirty-two".