20121102020 has 24 divisors (see below), whose sum is σ = 42318460800. Its totient is φ = 8036222432.

The previous prime is 20121102007. The next prime is 20121102037. The reversal of 20121102020 is 2020112102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20121101992 and 20121102010.

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 7 ways as a sum of consecutive naturals, for example, 750140 + ... + 776499.

It is an arithmetic number, because the mean of its divisors is an integer number (1763269200).

Almost surely, 2^20121102020 is an apocalyptic number.

20121102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121102020 is an abundant number, since it is smaller than the sum of its proper divisors (22197358780).

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

20121102020 is a wasteful number, since it uses less digits than its factorization.

20121102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527307 (or 1527305 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20121102020 its reverse (2020112102), we get a palindrome (22141214122).

The spelling of 20121102020 in words is "twenty billion, one hundred twenty-one million, one hundred two thousand, twenty".