1021010110021 has 8 divisors (see below), whose sum is σ = 1113838473888. Its totient is φ = 928183290000.

The previous prime is 1021010109997. The next prime is 1021010110039. The reversal of 1021010110021 is 1200110101201.

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 1021010110021 - 2³⁷ = 883571156549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021010110621) 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 7 ways as a sum of consecutive naturals, for example, 1327671 + ... + 1950571.

It is an arithmetic number, because the mean of its divisors is an integer number (139229809236).

Almost surely, 2^{1021010110021} is an apocalyptic number.

1021010110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021010110021 is a deficient number, since it is larger than the sum of its proper divisors (92828363867).

1021010110021 is a wasteful number, since it uses less digits than its factorization.

1021010110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771923.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1021010110021 its reverse (1200110101201), we get a palindrome (2221120211222).

The spelling of 1021010110021 in words is "one trillion, twenty-one billion, ten million, one hundred ten thousand, twenty-one".