21210101120200 has 24 divisors (see below), whose sum is σ = 49313485104930. Its totient is φ = 8484040448000.

The previous prime is 21210101120107. The next prime is 21210101120231. The reversal of 21210101120200 is 202110101212.

It can be written as a sum of positive squares in 3 ways, for example, as 11787178096516 + 9422923023684 = 3433246^2 + 3069678^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53025252601 + ... + 53025253000.

Almost surely, 2^{21210101120200} is an apocalyptic number.

21210101120200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210101120200 is an abundant number, since it is smaller than the sum of its proper divisors (28103383984730).

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

21210101120200 is a wasteful number, since it uses less digits than its factorization.

21210101120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106050505617 (or 106050505608 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21210101120200 its reverse (202110101212), we get a palindrome (21412211221412).

The spelling of 21210101120200 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, one hundred twenty thousand, two hundred".