21210101112010 has 16 divisors (see below), whose sum is σ = 38181602880072. Its totient is φ = 8483280249600.

The previous prime is 21210101111993. The next prime is 21210101112023. The reversal of 21210101112010 is 1021110101212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6495611725201 + 14714489386809 = 2548649^2 + 3835947^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94907211 + ... + 95130430.

Almost surely, 2^{21210101112010} is an apocalyptic number.

21210101112010 is a deficient number, since it is larger than the sum of its proper divisors (16971501768062).

21210101112010 is a wasteful number, since it uses less digits than its factorization.

21210101112010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190048809.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21210101112010 its reverse (1021110101212), we get a palindrome (22231211213222).

The spelling of 21210101112010 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, one hundred twelve thousand, ten".