21021101022201 has 32 divisors (see below), whose sum is σ = 32245478995968. Its totient is φ = 11932066713600.

The previous prime is 21021101022169. The next prime is 21021101022223. The reversal of 21021101022201 is 10222010112012.

It is not a de Polignac number, because 21021101022201 - 2⁵ = 21021101022169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21021101022001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98121066 + ... + 98335068.

It is an arithmetic number, because the mean of its divisors is an integer number (1007671218624).

Almost surely, 2^{21021101022201} is an apocalyptic number.

21021101022201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21021101022201 is a deficient number, since it is larger than the sum of its proper divisors (11224377973767).

21021101022201 is a wasteful number, since it uses less digits than its factorization.

21021101022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245141.

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

Adding to 21021101022201 its reverse (10222010112012), we get a palindrome (31243111134213).

The spelling of 21021101022201 in words is "twenty-one trillion, twenty-one billion, one hundred one million, twenty-two thousand, two hundred one".