20101221222211 has 8 divisors (see below), whose sum is σ = 20148284583504. Its totient is φ = 20054172839520.

The previous prime is 20101221222143. The next prime is 20101221222259. The reversal of 20101221222211 is 11222212210102.

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 20101221222211 - 2³⁵ = 20066861483843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101221222611) 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, 1055260 + ... + 6427753.

It is an arithmetic number, because the mean of its divisors is an integer number (2518535572938).

Almost surely, 2^{20101221222211} is an apocalyptic number.

20101221222211 is a deficient number, since it is larger than the sum of its proper divisors (47063361293).

20101221222211 is an equidigital number, since it uses as much as digits as its factorization.

20101221222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7489301.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20101221222211 its reverse (11222212210102), we get a palindrome (31323433432313).

The spelling of 20101221222211 in words is "twenty trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred eleven".