21220122102240 has 96 divisors (see below), whose sum is σ = 68397882005376. Its totient is φ = 5527101565440.

The previous prime is 21220122102229. The next prime is 21220122102241. The reversal of 21220122102240 is 4220122102212.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220122102241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514032706 + ... + 514073985.

It is an arithmetic number, because the mean of its divisors is an integer number (712477937556).

Almost surely, 2^{21220122102240} is an apocalyptic number.

21220122102240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220122102240 is an abundant number, since it is smaller than the sum of its proper divisors (47177759903136).

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

21220122102240 is a wasteful number, since it uses less digits than its factorization.

21220122102240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028106752 (or 1028106744 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21220122102240 its reverse (4220122102212), we get a palindrome (25440244204452).

The spelling of 21220122102240 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred two thousand, two hundred forty".