21001200220101 has 8 divisors (see below), whose sum is σ = 28004697509184. Its totient is φ = 13999251538880.

The previous prime is 21001200220037. The next prime is 21001200220103. The reversal of 21001200220101 is 10102200210012.

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

It is a cyclic number.

It is not a de Polignac number, because 21001200220101 - 2⁶ = 21001200220037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001200220103) 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, 387120321 + ... + 387174566.

It is an arithmetic number, because the mean of its divisors is an integer number (3500587188648).

Almost surely, 2^{21001200220101} is an apocalyptic number.

It is an amenable number.

21001200220101 is a deficient number, since it is larger than the sum of its proper divisors (7003497289083).

21001200220101 is an equidigital number, since it uses as much as digits as its factorization.

21001200220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774303931.

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

Adding to 21001200220101 its reverse (10102200210012), we get a palindrome (31103400430113).

The spelling of 21001200220101 in words is "twenty-one trillion, one billion, two hundred million, two hundred twenty thousand, one hundred one".