221221121012202 has 128 divisors (see below), whose sum is σ = 470827565660160. Its totient is φ = 69171318420480.

The previous prime is 221221121012183. The next prime is 221221121012251. The reversal of 221221121012202 is 202210121122122.

221221121012202 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 an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3641050008 + ... + 3641110764.

It is an arithmetic number, because the mean of its divisors is an integer number (3678340356720).

Almost surely, 2^{221221121012202} is an apocalyptic number.

221221121012202 is an abundant number, since it is smaller than the sum of its proper divisors (249606444647958).

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

221221121012202 is a wasteful number, since it uses less digits than its factorization.

221221121012202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62816.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221221121012202 its reverse (202210121122122), we get a palindrome (423431242134324).

The spelling of 221221121012202 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, two hundred two".