1220122010221 has 4 divisors (see below), whose sum is σ = 1229729270272. Its totient is φ = 1210514750172.

The previous prime is 1220122010209. The next prime is 1220122010249. The reversal of 1220122010221 is 1220102210221.

It is a happy number.

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 1220122010221 - 2¹¹ = 1220122008173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220122010195 and 1220122010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220122010251) 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, 4803629835 + ... + 4803630088.

It is an arithmetic number, because the mean of its divisors is an integer number (307432317568).

Almost surely, 2^{1220122010221} is an apocalyptic number.

It is an amenable number.

1220122010221 is a deficient number, since it is larger than the sum of its proper divisors (9607260051).

1220122010221 is an equidigital number, since it uses as much as digits as its factorization.

1220122010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9607260050.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220122010221 its reverse (1220102210221), we get a palindrome (2440224220442).

The spelling of 1220122010221 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, ten thousand, two hundred twenty-one".