1221102022 has 16 divisors (see below), whose sum is σ = 2099358720. Its totient is φ = 521819208.

The previous prime is 1221102011. The next prime is 1221102023. The reversal of 1221102022 is 2202011221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221101993 and 1221102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221102023) 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, 120822 + ... + 130537.

It is an arithmetic number, because the mean of its divisors is an integer number (131209920).

Almost surely, 2^1221102022 is an apocalyptic number.

1221102022 is a deficient number, since it is larger than the sum of its proper divisors (878256698).

1221102022 is a wasteful number, since it uses less digits than its factorization.

1221102022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251715.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1221102022 is about 34944.2702313269. The cubic root of 1221102022 is about 1068.8513664579.

Adding to 1221102022 its reverse (2202011221), we get a palindrome (3423113243).

The spelling of 1221102022 in words is "one billion, two hundred twenty-one million, one hundred two thousand, twenty-two".