21212214003 has 24 divisors (see below), whose sum is σ = 31107864528. Its totient is φ = 13925621952.

The previous prime is 21212213927. The next prime is 21212214007. The reversal of 21212214003 is 30041221212.

It is a happy number.

21212214003 is a `hidden beast` number, since 21 + 21 + 221 + 400 + 3 = 666.

It is not a de Polignac number, because 21212214003 - 2¹³ = 21212205811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212214007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2937225 + ... + 2944437.

It is an arithmetic number, because the mean of its divisors is an integer number (1296161022).

Almost surely, 2^21212214003 is an apocalyptic number.

21212214003 is a deficient number, since it is larger than the sum of its proper divisors (9895650525).

21212214003 is a wasteful number, since it uses less digits than its factorization.

21212214003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12163 (or 12160 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21212214003 its reverse (30041221212), we get a palindrome (51253435215).

The spelling of 21212214003 in words is "twenty-one billion, two hundred twelve million, two hundred fourteen thousand, three".