1222020101 has 8 divisors (see below), whose sum is σ = 1232354304. Its totient is φ = 1211727280.

The previous prime is 1222020083. The next prime is 1222020133. The reversal of 1222020101 is 1010202221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1222020101 - 2²⁶ = 1154911237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222020161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50456 + ... + 70638.

It is an arithmetic number, because the mean of its divisors is an integer number (154044288).

Almost surely, 2^1222020101 is an apocalyptic number.

1222020101 is the 20183-rd octagonal number.

It is an amenable number.

1222020101 is a deficient number, since it is larger than the sum of its proper divisors (10334203).

1222020101 is a wasteful number, since it uses less digits than its factorization.

1222020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20691.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1222020101 is about 34957.4040941258. The cubic root of 1222020101 is about 1069.1191694077.

Adding to 1222020101 its reverse (1010202221), we get a palindrome (2232222322).

The spelling of 1222020101 in words is "one billion, two hundred twenty-two million, twenty thousand, one hundred one".