202001001221001 has 16 divisors (see below), whose sum is σ = 269559937075968. Its totient is φ = 134554705017600.

The previous prime is 202001001220943. The next prime is 202001001221003. The reversal of 202001001221001 is 100122100100202.

It is not a de Polignac number, because 202001001221001 - 2⁹ = 202001001220489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (202001001221003) 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 15 ways as a sum of consecutive naturals, for example, 158300161 + ... + 159571121.

It is an arithmetic number, because the mean of its divisors is an integer number (16847496067248).

Almost surely, 2^{202001001221001} is an apocalyptic number.

It is an amenable number.

202001001221001 is a deficient number, since it is larger than the sum of its proper divisors (67558935854967).

202001001221001 is a wasteful number, since it uses less digits than its factorization.

202001001221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315232.

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

Adding to 202001001221001 its reverse (100122100100202), we get a palindrome (302123101321203).

The spelling of 202001001221001 in words is "two hundred two trillion, one billion, one million, two hundred twenty-one thousand, one".