1022201001221 has 4 divisors (see below), whose sum is σ = 1023820971744. Its totient is φ = 1020581030700.

The previous prime is 1022201001209. The next prime is 1022201001251. The reversal of 1022201001221 is 1221001022201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1022201001221 - 2¹⁴ = 1022200984837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1022201001196 and 1022201001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022201001251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809984315 + ... + 809985576.

It is an arithmetic number, because the mean of its divisors is an integer number (255955242936).

Almost surely, 2^{1022201001221} is an apocalyptic number.

It is an amenable number.

1022201001221 is a deficient number, since it is larger than the sum of its proper divisors (1619970523).

1022201001221 is an equidigital number, since it uses as much as digits as its factorization.

1022201001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619970522.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1022201001221 its reverse (1221001022201), we get a palindrome (2243202023422).

The spelling of 1022201001221 in words is "one trillion, twenty-two billion, two hundred one million, one thousand, two hundred twenty-one".