221022011212102 has 4 divisors (see below), whose sum is σ = 331533016818156. Its totient is φ = 110511005606050.

The previous prime is 221022011212099. The next prime is 221022011212103. The reversal of 221022011212102 is 201212110220122.

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 221022011212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022011212103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255502803024 + ... + 55255502803027.

It is an arithmetic number, because the mean of its divisors is an integer number (82883254204539).

Almost surely, 2^{221022011212102} is an apocalyptic number.

221022011212102 is a deficient number, since it is larger than the sum of its proper divisors (110511005606054).

221022011212102 is a wasteful number, since it uses less digits than its factorization.

221022011212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110511005606053.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221022011212102 its reverse (201212110220122), we get a palindrome (422234121432224).

The spelling of 221022011212102 in words is "two hundred twenty-one trillion, twenty-two billion, eleven million, two hundred twelve thousand, one hundred two".