101021020021 has 16 divisors (see below), whose sum is σ = 106992768960. Its totient is φ = 95217615360.

The previous prime is 101021019989. The next prime is 101021020091. The reversal of 101021020021 is 120020120101.

It is a cyclic number.

It is not a de Polignac number, because 101021020021 - 2⁵ = 101021019989 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 (101021020091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2386981 + ... + 2428933.

It is an arithmetic number, because the mean of its divisors is an integer number (6687048060).

Almost surely, 2^101021020021 is an apocalyptic number.

It is an amenable number.

101021020021 is a deficient number, since it is larger than the sum of its proper divisors (5971748939).

101021020021 is a wasteful number, since it uses less digits than its factorization.

101021020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43956.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 101021020021 its reverse (120020120101), we get a palindrome (221041140122).

The spelling of 101021020021 in words is "one hundred one billion, twenty-one million, twenty thousand, twenty-one".