1020021221001 has 8 divisors (see below), whose sum is σ = 1368172177344. Its totient is φ = 675942206000.

The previous prime is 1020021220991. The next prime is 1020021221003. The reversal of 1020021221001 is 1001221200201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020021221001 - 2⁵ = 1020021220969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020021221003) 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 7 ways as a sum of consecutive naturals, for example, 1017984750 + ... + 1017985751.

It is an arithmetic number, because the mean of its divisors is an integer number (171021522168).

Almost surely, 2^{1020021221001} is an apocalyptic number.

It is an amenable number.

1020021221001 is a deficient number, since it is larger than the sum of its proper divisors (348150956343).

1020021221001 is a wasteful number, since it uses less digits than its factorization.

1020021221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035970671.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1020021221001 its reverse (1001221200201), we get a palindrome (2021242421202).

The spelling of 1020021221001 in words is "one trillion, twenty billion, twenty-one million, two hundred twenty-one thousand, one".