1021201552535 has 4 divisors (see below), whose sum is σ = 1225441863048. Its totient is φ = 816961242024.

The previous prime is 1021201552493. The next prime is 1021201552541. The reversal of 1021201552535 is 5352551021201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021201552535 - 2⁶ = 1021201552471 is a prime.

It is a super-2 number, since 2×1021201552535² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102120155249 + ... + 102120155258.

It is an arithmetic number, because the mean of its divisors is an integer number (306360465762).

Almost surely, 2^{1021201552535} is an apocalyptic number.

1021201552535 is a deficient number, since it is larger than the sum of its proper divisors (204240310513).

1021201552535 is an equidigital number, since it uses as much as digits as its factorization.

1021201552535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204240310512.

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 1021201552535 its reverse (5352551021201), we get a palindrome (6373752573736).

The spelling of 1021201552535 in words is "one trillion, twenty-one billion, two hundred one million, five hundred fifty-two thousand, five hundred thirty-five".