21980398222 has 4 divisors (see below), whose sum is σ = 32970597336. Its totient is φ = 10990199110.

The previous prime is 21980398213. The next prime is 21980398249. The reversal of 21980398222 is 22289308912.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21980398222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5495099554 + ... + 5495099557.

It is an arithmetic number, because the mean of its divisors is an integer number (8242649334).

Almost surely, 2^21980398222 is an apocalyptic number.

21980398222 is a deficient number, since it is larger than the sum of its proper divisors (10990199114).

21980398222 is a wasteful number, since it uses less digits than its factorization.

21980398222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10990199113.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 21980398222 in words is "twenty-one billion, nine hundred eighty million, three hundred ninety-eight thousand, two hundred twenty-two".