2221210122122 has 4 divisors (see below), whose sum is σ = 3331815183186. Its totient is φ = 1110605061060.

The previous prime is 2221210122121. The next prime is 2221210122137. The reversal of 2221210122122 is 2212210121222.

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

It can be written as a sum of positive squares in only one way, i.e., 1695206604001 + 526003518121 = 1302001^2 + 725261^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2221210122094 and 2221210122103.

It is not an unprimeable number, because it can be changed into a prime (2221210122121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555302530529 + ... + 555302530532.

Almost surely, 2^{2221210122122} is an apocalyptic number.

2221210122122 is a deficient number, since it is larger than the sum of its proper divisors (1110605061064).

2221210122122 is a wasteful number, since it uses less digits than its factorization.

2221210122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110605061063.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2221210122122 its reverse (2212210121222), we get a palindrome (4433420243344).

The spelling of 2221210122122 in words is "two trillion, two hundred twenty-one billion, two hundred ten million, one hundred twenty-two thousand, one hundred twenty-two".