21203130212 has 24 divisors (see below), whose sum is σ = 40482493632. Its totient is φ = 9636884000.

The previous prime is 21203130181. The next prime is 21203130217.

21203130212 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21203130217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749558 + ... + 777330.

It is an arithmetic number, because the mean of its divisors is an integer number (1686770568).

Almost surely, 2^21203130212 is an apocalyptic number.

21203130212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21203130212 is a deficient number, since it is larger than the sum of its proper divisors (19279363420).

21203130212 is a wasteful number, since it uses less digits than its factorization.

21203130212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45139 (or 45137 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The spelling of 21203130212 in words is "twenty-one billion, two hundred three million, one hundred thirty thousand, two hundred twelve".