20011210100 has 36 divisors (see below), whose sum is σ = 49627802784. Its totient is φ = 6860986080.

The previous prime is 20011210091. The next prime is 20011210123. The reversal of 20011210100 is 101211002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14293022 + ... + 14294421.

Almost surely, 2^20011210100 is an apocalyptic number.

20011210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011210100 is an abundant number, since it is smaller than the sum of its proper divisors (29616592684).

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

20011210100 is a wasteful number, since it uses less digits than its factorization.

20011210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28587464 (or 28587457 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20011210100 its reverse (101211002), we get a palindrome (20112421102).

The spelling of 20011210100 in words is "twenty billion, eleven million, two hundred ten thousand, one hundred".