20010221112101 has 4 divisors (see below), whose sum is σ = 21829332122304. Its totient is φ = 18191110101900.

The previous prime is 20010221112071. The next prime is 20010221112121. The reversal of 20010221112101 is 10121112201002.

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 not a de Polignac number, because 20010221112101 - 2¹⁴ = 20010221095717 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 (20010221112121) 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 3 ways as a sum of consecutive naturals, for example, 909555505085 + ... + 909555505106.

It is an arithmetic number, because the mean of its divisors is an integer number (5457333030576).

Almost surely, 2^{20010221112101} is an apocalyptic number.

It is an amenable number.

20010221112101 is a deficient number, since it is larger than the sum of its proper divisors (1819111010203).

20010221112101 is a wasteful number, since it uses less digits than its factorization.

20010221112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819111010202.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20010221112101 its reverse (10121112201002), we get a palindrome (30131333313103).

The spelling of 20010221112101 in words is "twenty trillion, ten billion, two hundred twenty-one million, one hundred twelve thousand, one hundred one".