21212013213122 has 8 divisors (see below), whose sum is σ = 31829211534096. Its totient is φ = 10602276035092.

The previous prime is 21212013213101. The next prime is 21212013213143. The reversal of 21212013213122 is 22131231021212.

It is an interprime number because it is at equal distance from previous prime (21212013213101) and next prime (21212013213143).

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, 1865278628 + ... + 1865289999.

It is an arithmetic number, because the mean of its divisors is an integer number (3978651441762).

Almost surely, 2^{21212013213122} is an apocalyptic number.

21212013213122 is a deficient number, since it is larger than the sum of its proper divisors (10617198320974).

21212013213122 is a wasteful number, since it uses less digits than its factorization.

21212013213122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730571472.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21212013213122 its reverse (22131231021212), we get a palindrome (43343244234334).

The spelling of 21212013213122 in words is "twenty-one trillion, two hundred twelve billion, thirteen million, two hundred thirteen thousand, one hundred twenty-two".