21302012214 has 48 divisors (see below), whose sum is σ = 55850659488. Its totient is φ = 5728271616.

The previous prime is 21302012213. The next prime is 21302012323. The reversal of 21302012214 is 41221020312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302012213) 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, 4970317 + ... + 4974600.

It is an arithmetic number, because the mean of its divisors is an integer number (1163555406).

Almost surely, 2^21302012214 is an apocalyptic number.

21302012214 is an abundant number, since it is smaller than the sum of its proper divisors (34548647274).

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

21302012214 is a wasteful number, since it uses less digits than its factorization.

21302012214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9944949 (or 9944946 counting only the distinct ones).

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

Adding to 21302012214 its reverse (41221020312), we get a palindrome (62523032526).

The spelling of 21302012214 in words is "twenty-one billion, three hundred two million, twelve thousand, two hundred fourteen".