20011202121020 has 48 divisors (see below), whose sum is σ = 46708823091168. Its totient is φ = 7139502639360.

The previous prime is 20011202120989. The next prime is 20011202121067. The reversal of 20011202121020 is 2012120211002.

It is a junction number, because it is equal to n+sod(n) for n = 20011202120986 and 20011202121004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 858101639 + ... + 858124958.

It is an arithmetic number, because the mean of its divisors is an integer number (973100481066).

Almost surely, 2^{20011202121020} is an apocalyptic number.

20011202121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011202121020 is an abundant number, since it is smaller than the sum of its proper divisors (26697620970148).

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

20011202121020 is a wasteful number, since it uses less digits than its factorization.

20011202121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716226670 (or 1716226668 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20011202121020 its reverse (2012120211002), we get a palindrome (22023322332022).

The spelling of 20011202121020 in words is "twenty trillion, eleven billion, two hundred two million, one hundred twenty-one thousand, twenty".