1202021000001 has 12 divisors (see below), whose sum is σ = 1736438551380. Its totient is φ = 801261489120.

The previous prime is 1202020999987. The next prime is 1202021000017. The reversal of 1202021000001 is 1000001202021.

It can be written as a sum of positive squares in 2 ways, for example, as 860469588225 + 341551411776 = 927615^2 + 584424^2 .

It is not a de Polignac number, because 1202021000001 - 2⁶ = 1202020999937 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 (1202021000041) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 7064946 + ... + 7233083.

It is an arithmetic number, because the mean of its divisors is an integer number (144703212615).

Almost surely, 2^{1202021000001} is an apocalyptic number.

It is an amenable number.

1202021000001 is a deficient number, since it is larger than the sum of its proper divisors (534417551379).

1202021000001 is a wasteful number, since it uses less digits than its factorization.

1202021000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14307376 (or 14307373 counting only the distinct ones).

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

Adding to 1202021000001 its reverse (1000001202021), we get a palindrome (2202022202022).

The spelling of 1202021000001 in words is "one trillion, two hundred two billion, twenty-one million, one", and thus it is an aban number.