21212210120012 has 6 divisors (see below), whose sum is σ = 37121367710028. Its totient is φ = 10606105060004.

The previous prime is 21212210119967. The next prime is 21212210120069. The reversal of 21212210120012 is 21002101221212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2651526264998 + ... + 2651526265005.

It is an arithmetic number, because the mean of its divisors is an integer number (6186894618338).

Almost surely, 2^{21212210120012} is an apocalyptic number.

It is an amenable number.

21212210120012 is a deficient number, since it is larger than the sum of its proper divisors (15909157590016).

21212210120012 is a wasteful number, since it uses less digits than its factorization.

21212210120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303052530007 (or 5303052530005 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21212210120012 its reverse (21002101221212), we get a palindrome (42214311341224).

The spelling of 21212210120012 in words is "twenty-one trillion, two hundred twelve billion, two hundred ten million, one hundred twenty thousand, twelve".