21212333107 has 16 divisors (see below), whose sum is σ = 24432244480. Its totient is φ = 18039980448.

The previous prime is 21212333101. The next prime is 21212333113. The reversal of 21212333107 is 70133321212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21212333101) and next prime (21212333113).

It is not a de Polignac number, because 21212333107 - 2⁷ = 21212332979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212333101) 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, 1810753 + ... + 1822429.

It is an arithmetic number, because the mean of its divisors is an integer number (1527015280).

Almost surely, 2^21212333107 is an apocalyptic number.

21212333107 is a deficient number, since it is larger than the sum of its proper divisors (3219911373).

21212333107 is a wasteful number, since it uses less digits than its factorization.

21212333107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13690.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 21212333107 its reverse (70133321212), we get a palindrome (91345654319).

The spelling of 21212333107 in words is "twenty-one billion, two hundred twelve million, three hundred thirty-three thousand, one hundred seven".