20212210100 has 36 divisors (see below), whose sum is σ = 44312687244. Its totient is φ = 8001530880.

The previous prime is 20212210099. The next prime is 20212210103. The reversal of 20212210100 is 101221202.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3818992804 + 16393217296 = 61798^2 + 128036^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212210103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1032167 + ... + 1051566.

It is an arithmetic number, because the mean of its divisors is an integer number (1230907979).

Almost surely, 2^20212210100 is an apocalyptic number.

20212210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212210100 is an abundant number, since it is smaller than the sum of its proper divisors (24100477144).

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

20212210100 is a wasteful number, since it uses less digits than its factorization.

20212210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083844 (or 2083837 counting only the distinct ones).

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

Adding to 20212210100 its reverse (101221202), we get a palindrome (20313431302).

The spelling of 20212210100 in words is "twenty billion, two hundred twelve million, two hundred ten thousand, one hundred".