21212120001010 has 8 divisors (see below), whose sum is σ = 38181816001836. Its totient is φ = 8484848000400.

The previous prime is 21212120000989. The next prime is 21212120001031. The reversal of 21212120001010 is 1010002121212.

It is an interprime number because it is at equal distance from previous prime (21212120000989) and next prime (21212120001031).

It can be written as a sum of positive squares in 2 ways, for example, as 19228075910289 + 1984044090721 = 4384983^2 + 1408561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060606000041 + ... + 1060606000060.

Almost surely, 2^{21212120001010} is an apocalyptic number.

21212120001010 is a deficient number, since it is larger than the sum of its proper divisors (16969696000826).

21212120001010 is a wasteful number, since it uses less digits than its factorization.

21212120001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121212000108.

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

Adding to 21212120001010 its reverse (1010002121212), we get a palindrome (22222122122222).

The spelling of 21212120001010 in words is "twenty-one trillion, two hundred twelve billion, one hundred twenty million, one thousand, ten".