20021012010101 has 8 divisors (see below), whose sum is σ = 20364914858904. Its totient is φ = 19677615275520.

The previous prime is 20021012010053. The next prime is 20021012010137. The reversal of 20021012010101 is 10101021012002.

It can be written as a sum of positive squares in 4 ways, for example, as 11076282891025 + 8944729119076 = 3328105^2 + 2990774^2 .

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 20021012010101 - 2⁴² = 15622965498997 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 (20021012010001) 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, 126448760 + ... + 126606993.

It is an arithmetic number, because the mean of its divisors is an integer number (2545614357363).

Almost surely, 2^{20021012010101} is an apocalyptic number.

It is an amenable number.

20021012010101 is a deficient number, since it is larger than the sum of its proper divisors (343902848803).

20021012010101 is a wasteful number, since it uses less digits than its factorization.

20021012010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253057111.

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

Adding to 20021012010101 its reverse (10101021012002), we get a palindrome (30122033022103).

The spelling of 20021012010101 in words is "twenty trillion, twenty-one billion, twelve million, ten thousand, one hundred one".