202021021001001 has 16 divisors (see below), whose sum is σ = 271879953326784. Its totient is φ = 133421395746624.

The previous prime is 202021021000961. The next prime is 202021021001039. The reversal of 202021021001001 is 100100120120202.

It is not a de Polignac number, because 202021021001001 - 2³⁴ = 202003841131817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (202021021002001) 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, 78943375 + ... + 81462251.

It is an arithmetic number, because the mean of its divisors is an integer number (16992497082924).

Almost surely, 2^{202021021001001} is an apocalyptic number.

It is an amenable number.

202021021001001 is a deficient number, since it is larger than the sum of its proper divisors (69858932325783).

202021021001001 is a wasteful number, since it uses less digits than its factorization.

202021021001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768840.

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

Adding to 202021021001001 its reverse (100100120120202), we get a palindrome (302121141121203).

The spelling of 202021021001001 in words is "two hundred two trillion, twenty-one billion, twenty-one million, one thousand, one".