21122220202 has 8 divisors (see below), whose sum is σ = 32705373312. Its totient is φ = 10220429100.

The previous prime is 21122220191. The next prime is 21122220253. The reversal of 21122220202 is 20202222112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21122220202² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170340424 + ... + 170340547.

It is an arithmetic number, because the mean of its divisors is an integer number (4088171664).

Almost surely, 2^21122220202 is an apocalyptic number.

21122220202 is a deficient number, since it is larger than the sum of its proper divisors (11583153110).

21122220202 is a wasteful number, since it uses less digits than its factorization.

21122220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340681004.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21122220202 its reverse (20202222112), we get a palindrome (41324442314).

The spelling of 21122220202 in words is "twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, two hundred two".