21200101122 has 32 divisors (see below), whose sum is σ = 43555708224. Its totient is φ = 6874200000.

The previous prime is 21200101093. The next prime is 21200101129. The reversal of 21200101122 is 22110100212.

It is a junction number, because it is equal to n+sod(n) for n = 21200101098 and 21200101107.

It is not an unprimeable number, because it can be changed into a prime (21200101129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1480497 + ... + 1494747.

It is an arithmetic number, because the mean of its divisors is an integer number (1361115882).

Almost surely, 2^21200101122 is an apocalyptic number.

21200101122 is an abundant number, since it is smaller than the sum of its proper divisors (22355607102).

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

21200101122 is a wasteful number, since it uses less digits than its factorization.

21200101122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20994.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21200101122 its reverse (22110100212), we get a palindrome (43310201334).

The spelling of 21200101122 in words is "twenty-one billion, two hundred million, one hundred one thousand, one hundred twenty-two".