1021210120001 has 12 divisors (see below), whose sum is σ = 1058293220400. Its totient is φ = 985385648688.

The previous prime is 1021210119997. The next prime is 1021210120031. The reversal of 1021210120001 is 1000210121201.

It is not a de Polignac number, because 1021210120001 - 2² = 1021210119997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021210120031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 986570 + ... + 1736588.

It is an arithmetic number, because the mean of its divisors is an integer number (88191101700).

Almost surely, 2^{1021210120001} is an apocalyptic number.

It is an amenable number.

1021210120001 is a deficient number, since it is larger than the sum of its proper divisors (37083100399).

1021210120001 is an equidigital number, since it uses as much as digits as its factorization.

1021210120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751696 (or 751667 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021210120001 its reverse (1000210121201), we get a palindrome (2021420241202).

The spelling of 1021210120001 in words is "one trillion, twenty-one billion, two hundred ten million, one hundred twenty thousand, one".