100212120020 has 48 divisors (see below), whose sum is σ = 213199354368. Its totient is φ = 39561287040.

The previous prime is 100212120011. The next prime is 100212120059. The reversal of 100212120020 is 20021212001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 100212119983 and 100212120010.

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, 1614602 + ... + 1675518.

It is an arithmetic number, because the mean of its divisors is an integer number (4441653216).

Almost surely, 2^100212120020 is an apocalyptic number.

100212120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100212120020 is an abundant number, since it is smaller than the sum of its proper divisors (112987234348).

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

100212120020 is a wasteful number, since it uses less digits than its factorization.

100212120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62000 (or 61998 counting only the distinct ones).

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

Adding to 100212120020 its reverse (20021212001), we get a palindrome (120233332021).

The spelling of 100212120020 in words is "one hundred billion, two hundred twelve million, one hundred twenty thousand, twenty".