21202201222120 has 64 divisors (see below), whose sum is σ = 50232001608000. Its totient is φ = 8031916459008.

The previous prime is 21202201222031. The next prime is 21202201222133. The reversal of 21202201222120 is 2122210220212.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2168002 + ... + 6863281.

It is an arithmetic number, because the mean of its divisors is an integer number (784875025125).

Almost surely, 2^{21202201222120} is an apocalyptic number.

21202201222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202201222120 is an abundant number, since it is smaller than the sum of its proper divisors (29029800385880).

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

21202201222120 is a wasteful number, since it uses less digits than its factorization.

21202201222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9034402 (or 9034398 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21202201222120 its reverse (2122210220212), we get a palindrome (23324411442332).

The spelling of 21202201222120 in words is "twenty-one trillion, two hundred two billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty".