21212000134 has 32 divisors (see below), whose sum is σ = 34876558080. Its totient is φ = 9615866400.

The previous prime is 21212000119. The next prime is 21212000167. The reversal of 21212000134 is 43100021212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1975039 + ... + 1985749.

It is an arithmetic number, because the mean of its divisors is an integer number (1089892440).

Almost surely, 2^21212000134 is an apocalyptic number.

21212000134 is a deficient number, since it is larger than the sum of its proper divisors (13664557946).

21212000134 is a wasteful number, since it uses less digits than its factorization.

21212000134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12076.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21212000134 its reverse (43100021212), we get a palindrome (64312021346).

The spelling of 21212000134 in words is "twenty-one billion, two hundred twelve million, one hundred thirty-four", and thus it is an aban number.