221021001210122 has 8 divisors (see below), whose sum is σ = 331532438517156. Its totient is φ = 110510188371072.

The previous prime is 221021001210029. The next prime is 221021001210223. The reversal of 221021001210122 is 221012100120122.

It can be written as a sum of positive squares in 2 ways, for example, as 220823731099321 + 197270110801 = 14860139^2 + 444151^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 221021001210122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155231153 + ... + 156648500.

Almost surely, 2^{221021001210122} is an apocalyptic number.

221021001210122 is a deficient number, since it is larger than the sum of its proper divisors (110511437307034).

221021001210122 is a wasteful number, since it uses less digits than its factorization.

221021001210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312233992.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221021001210122 its reverse (221012100120122), we get a palindrome (442033101330244).

The spelling of 221021001210122 in words is "two hundred twenty-one trillion, twenty-one billion, one million, two hundred ten thousand, one hundred twenty-two".