20211001222101 has 64 divisors (see below), whose sum is σ = 27916713006336. Its totient is φ = 12996542361600.

The previous prime is 20211001222031. The next prime is 20211001222103. The reversal of 20211001222101 is 10122210011202.

It is not a de Polignac number, because 20211001222101 - 2⁷ = 20211001221973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211001222103) 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 63 ways as a sum of consecutive naturals, for example, 13014166141 + ... + 13014167693.

It is an arithmetic number, because the mean of its divisors is an integer number (436198640724).

Almost surely, 2^{20211001222101} is an apocalyptic number.

It is an amenable number.

20211001222101 is a deficient number, since it is larger than the sum of its proper divisors (7705711784235).

20211001222101 is a wasteful number, since it uses less digits than its factorization.

20211001222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3542.

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

Adding to 20211001222101 its reverse (10122210011202), we get a palindrome (30333211233303).

The spelling of 20211001222101 in words is "twenty trillion, two hundred eleven billion, one million, two hundred twenty-two thousand, one hundred one".