1021202010021 has 8 divisors (see below), whose sum is σ = 1371996594144. Its totient is φ = 675604382960.

The previous prime is 1021202009969. The next prime is 1021202010061. The reversal of 1021202010021 is 1200102021201.

1021202010021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 1021202010021 - 2³⁴ = 1004022140837 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021202009979 and 1021202010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021202010061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299238806 + ... + 1299239591.

It is an arithmetic number, because the mean of its divisors is an integer number (171499574268).

Almost surely, 2^{1021202010021} is an apocalyptic number.

It is an amenable number.

1021202010021 is a deficient number, since it is larger than the sum of its proper divisors (350794584123).

1021202010021 is a wasteful number, since it uses less digits than its factorization.

1021202010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598478531.

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

Adding to 1021202010021 its reverse (1200102021201), we get a palindrome (2221304031222).

The spelling of 1021202010021 in words is "one trillion, twenty-one billion, two hundred two million, ten thousand, twenty-one".