21434002212 has 24 divisors (see below), whose sum is σ = 57157339456. Its totient is φ = 6124000608.

The previous prime is 21434002211. The next prime is 21434002223. The reversal of 21434002212 is 21220043412.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21434002211) 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, 127583263 + ... + 127583430.

Almost surely, 2^21434002212 is an apocalyptic number.

It is an amenable number.

21434002212 is an abundant number, since it is smaller than the sum of its proper divisors (35723337244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21434002212 is a wasteful number, since it uses less digits than its factorization.

21434002212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255166707 (or 255166705 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21434002212 its reverse (21220043412), we get a palindrome (42654045624).

The spelling of 21434002212 in words is "twenty-one billion, four hundred thirty-four million, two thousand, two hundred twelve".