20110221000101 has 4 divisors (see below), whose sum is σ = 20984578434912. Its totient is φ = 19235863565292.

The previous prime is 20110221000061. The next prime is 20110221000119. The reversal of 20110221000101 is 10100012201102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110221000101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110221000301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437178717371 + ... + 437178717416.

It is an arithmetic number, because the mean of its divisors is an integer number (5246144608728).

Almost surely, 2^{20110221000101} is an apocalyptic number.

It is an amenable number.

20110221000101 is a deficient number, since it is larger than the sum of its proper divisors (874357434811).

20110221000101 is an equidigital number, since it uses as much as digits as its factorization.

20110221000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874357434810.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20110221000101 its reverse (10100012201102), we get a palindrome (30210233201203).

The spelling of 20110221000101 in words is "twenty trillion, one hundred ten billion, two hundred twenty-one million, one hundred one", and thus it is an aban number.