20210101112101 has 4 divisors (see below), whose sum is σ = 20210153932332. Its totient is φ = 20210048291872.

The previous prime is 20210101112083. The next prime is 20210101112147. The reversal of 20210101112101 is 10121110101202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8858093825025 + 11352007287076 = 2976255^2 + 3369274^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210101112101 - 2⁷ = 20210101111973 is a prime.

It is a super-2 number, since 2×20210101112101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210101112501) 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, 25831966 + ... + 26602831.

It is an arithmetic number, because the mean of its divisors is an integer number (5052538483083).

Almost surely, 2^{20210101112101} is an apocalyptic number.

It is an amenable number.

20210101112101 is a deficient number, since it is larger than the sum of its proper divisors (52820231).

20210101112101 is an equidigital number, since it uses as much as digits as its factorization.

20210101112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52820230.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20210101112101 its reverse (10121110101202), we get a palindrome (30331211213303).

The spelling of 20210101112101 in words is "twenty trillion, two hundred ten billion, one hundred one million, one hundred twelve thousand, one hundred one".