21121012202001 has 8 divisors (see below), whose sum is σ = 28161395662944. Its totient is φ = 14080651771200.

The previous prime is 21121012201987. The next prime is 21121012202033. The reversal of 21121012202001 is 10020221012112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21121012202001 - 2¹⁵ = 21121012169233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21121012202071) 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, 3490056 + ... + 7377161.

It is an arithmetic number, because the mean of its divisors is an integer number (3520174457868).

Almost surely, 2^{21121012202001} is an apocalyptic number.

It is an amenable number.

21121012202001 is a deficient number, since it is larger than the sum of its proper divisors (7040383460943).

21121012202001 is a wasteful number, since it uses less digits than its factorization.

21121012202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11515071.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21121012202001 its reverse (10020221012112), we get a palindrome (31141233214113).

The spelling of 21121012202001 in words is "twenty-one trillion, one hundred twenty-one billion, twelve million, two hundred two thousand, one".