20021102011020 has 48 divisors (see below), whose sum is σ = 61155366144768. Its totient is φ = 4853600487360.

The previous prime is 20021102010991. The next prime is 20021102011081. The reversal of 20021102011020 is 2011020112002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20021102010987 and 20021102011005.

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, 15167500864 + ... + 15167502183.

It is an arithmetic number, because the mean of its divisors is an integer number (1274070128016).

Almost surely, 2^{20021102011020} is an apocalyptic number.

20021102011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021102011020 is an abundant number, since it is smaller than the sum of its proper divisors (41134264133748).

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

20021102011020 is a wasteful number, since it uses less digits than its factorization.

20021102011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30335003070 (or 30335003068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021102011020 its reverse (2011020112002), we get a palindrome (22032122123022).

The spelling of 20021102011020 in words is "twenty trillion, twenty-one billion, one hundred two million, eleven thousand, twenty".