211221022202001 has 12 divisors (see below), whose sum is σ = 348682322365312. Its totient is φ = 120697726972536.

The previous prime is 211221022201997. The next prime is 211221022202083. The reversal of 211221022202001 is 100202220122112.

It is a happy number.

211221022202001 is a `hidden beast` number, since 21 + 1 + 221 + 0 + 2 + 220 + 200 + 1 = 666.

211221022202001 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211221022202001 - 2² = 211221022201997 is a prime.

It is a super-2 number, since 2×211221022202001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211221022207001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1676357319001 + ... + 1676357319126.

Almost surely, 2^{211221022202001} is an apocalyptic number.

211221022202001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211221022202001 is a deficient number, since it is larger than the sum of its proper divisors (137461300163311).

211221022202001 is a wasteful number, since it uses less digits than its factorization.

211221022202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352714638140 (or 3352714638137 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211221022202001 its reverse (100202220122112), we get a palindrome (311423242324113).

The spelling of 211221022202001 in words is "two hundred eleven trillion, two hundred twenty-one billion, twenty-two million, two hundred two thousand, one".