101220020020 has 48 divisors (see below), whose sum is σ = 242975392128. Its totient is φ = 34697243520.

The previous prime is 101220019973. The next prime is 101220020053. The reversal of 101220020020 is 20020022101.

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 = 101220019979 and 101220020006.

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, 678835 + ... + 814405.

It is an arithmetic number, because the mean of its divisors is an integer number (5061987336).

Almost surely, 2^101220020020 is an apocalyptic number.

101220020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101220020020 is an abundant number, since it is smaller than the sum of its proper divisors (141755372108).

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

101220020020 is a wasteful number, since it uses less digits than its factorization.

101220020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140920 (or 140918 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 101220020020 its reverse (20020022101), we get a palindrome (121240042121).

The spelling of 101220020020 in words is "one hundred one billion, two hundred twenty million, twenty thousand, twenty".