221001212020222 has 4 divisors (see below), whose sum is σ = 331501818030336. Its totient is φ = 110500606010110.

The previous prime is 221001212020213. The next prime is 221001212020241. The reversal of 221001212020222 is 222020212100122.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 221001212020222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55250303005054 + ... + 55250303005057.

It is an arithmetic number, because the mean of its divisors is an integer number (82875454507584).

Almost surely, 2^{221001212020222} is an apocalyptic number.

221001212020222 is a deficient number, since it is larger than the sum of its proper divisors (110500606010114).

221001212020222 is a wasteful number, since it uses less digits than its factorization.

221001212020222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110500606010113.

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

Adding to 221001212020222 its reverse (222020212100122), we get a palindrome (443021424120344).

The spelling of 221001212020222 in words is "two hundred twenty-one trillion, one billion, two hundred twelve million, twenty thousand, two hundred twenty-two".