20010101201020 has 48 divisors (see below), whose sum is σ = 48033913213440. Its totient is φ = 6859224650304.

The previous prime is 20010101200987. The next prime is 20010101201053. The reversal of 20010101201020 is 2010210101002.

It is an interprime number because it is at equal distance from previous prime (20010101200987) and next prime (20010101201053).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20010101200988 and 20010101201006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13692510 + ... + 15083269.

It is an arithmetic number, because the mean of its divisors is an integer number (1000706525280).

Almost surely, 2^{20010101201020} is an apocalyptic number.

20010101201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010101201020 is an abundant number, since it is smaller than the sum of its proper divisors (28023812012420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20010101201020 is a wasteful number, since it uses less digits than its factorization.

20010101201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28780762 (or 28780760 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20010101201020 its reverse (2010210101002), we get a palindrome (22020311302022).

The spelling of 20010101201020 in words is "twenty trillion, ten billion, one hundred one million, two hundred one thousand, twenty".