210222022021221 has 16 divisors (see below), whose sum is σ = 320340092230784. Its totient is φ = 120126204866304.

The previous prime is 210222022021217. The next prime is 210222022021243. The reversal of 210222022021221 is 122120220222012.

It is not a de Polignac number, because 210222022021221 - 2² = 210222022021217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210222022021321) 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, 23805136 + ... + 31418601.

It is an arithmetic number, because the mean of its divisors is an integer number (20021255764424).

Almost surely, 2^{210222022021221} is an apocalyptic number.

210222022021221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210222022021221 is a deficient number, since it is larger than the sum of its proper divisors (110118070209563).

210222022021221 is a wasteful number, since it uses less digits than its factorization.

210222022021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55405020.

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

Adding to 210222022021221 its reverse (122120220222012), we get a palindrome (332342242243233).

The spelling of 210222022021221 in words is "two hundred ten trillion, two hundred twenty-two billion, twenty-two million, twenty-one thousand, two hundred twenty-one".