1020021200001 has 12 divisors (see below), whose sum is σ = 1527932991312. Its totient is φ = 680014133172.

The previous prime is 1020021199963. The next prime is 1020021200057. The reversal of 1020021200001 is 1000021200201.

It is not a de Polignac number, because 1020021200001 - 2⁶ = 1020021199937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1020021202001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2098808811 + ... + 2098809296.

It is an arithmetic number, because the mean of its divisors is an integer number (127327749276).

Almost surely, 2^{1020021200001} is an apocalyptic number.

It is an amenable number.

1020021200001 is a deficient number, since it is larger than the sum of its proper divisors (507911791311).

1020021200001 is an frugal number, since it uses more digits than its factorization.

1020021200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4197618122 (or 4197618110 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1020021200001 its reverse (1000021200201), we get a palindrome (2020042400202).

The spelling of 1020021200001 in words is "one trillion, twenty billion, twenty-one million, two hundred thousand, one".