221212212210202 has 16 divisors (see below), whose sum is σ = 331937101094400. Its totient is φ = 110566512667840.

The previous prime is 221212212210193. The next prime is 221212212210221. The reversal of 221212212210202 is 202012212212122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846358674 + ... + 846620002.

It is an arithmetic number, because the mean of its divisors is an integer number (20746068818400).

Almost surely, 2^{221212212210202} is an apocalyptic number.

221212212210202 is a deficient number, since it is larger than the sum of its proper divisors (110724888884198).

221212212210202 is a wasteful number, since it uses less digits than its factorization.

221212212210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411221.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221212212210202 its reverse (202012212212122), we get a palindrome (423224424422324).

The spelling of 221212212210202 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred twelve million, two hundred ten thousand, two hundred two".