1020220021002 has 96 divisors (see below), whose sum is σ = 2536237066752. Its totient is φ = 267883267392.

The previous prime is 1020220020949. The next prime is 1020220021019. The reversal of 1020220021002 is 2001200220201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1294653 + ... + 1927839.

It is an arithmetic number, because the mean of its divisors is an integer number (26419136112).

Almost surely, 2^{1020220021002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020220021002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1268118533376).

1020220021002 is an abundant number, since it is smaller than the sum of its proper divisors (1516017045750).

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

1020220021002 is a wasteful number, since it uses less digits than its factorization.

1020220021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633452 (or 633439 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1020220021002 its reverse (2001200220201), we get a palindrome (3021420241203).

The spelling of 1020220021002 in words is "one trillion, twenty billion, two hundred twenty million, twenty-one thousand, two".