20212103100 has 216 divisors, whose sum is σ = 71609583360. Its totient is φ = 4376695680.

The previous prime is 20212103099. The next prime is 20212103129. The reversal of 20212103100 is 130121202.

It is a super-2 number, since 2×20212103100² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 243117 + ... + 315483.

Almost surely, 2^20212103100 is an apocalyptic number.

20212103100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20212103100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35804791680).

20212103100 is an abundant number, since it is smaller than the sum of its proper divisors (51397480260).

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

20212103100 is a wasteful number, since it uses less digits than its factorization.

20212103100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72417 (or 72403 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20212103100 its reverse (130121202), we get a palindrome (20342224302).

The spelling of 20212103100 in words is "twenty billion, two hundred twelve million, one hundred three thousand, one hundred".