20011021120101 has 16 divisors (see below), whose sum is σ = 29109608493120. Its totient is φ = 12126779637120.

The previous prime is 20011021120063. The next prime is 20011021120169. The reversal of 20011021120101 is 10102112011002.

It is not a de Polignac number, because 20011021120101 - 2²² = 20011016925797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011021160101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27433320 + ... + 28153313.

It is an arithmetic number, because the mean of its divisors is an integer number (1819350530820).

Almost surely, 2^{20011021120101} is an apocalyptic number.

It is an amenable number.

20011021120101 is a deficient number, since it is larger than the sum of its proper divisors (9098587373019).

20011021120101 is a wasteful number, since it uses less digits than its factorization.

20011021120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55597556.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20011021120101 its reverse (10102112011002), we get a palindrome (30113133131103).

The spelling of 20011021120101 in words is "twenty trillion, eleven billion, twenty-one million, one hundred twenty thousand, one hundred one".