1221110022 has 32 divisors (see below), whose sum is σ = 2666162304. Its totient is φ = 369766400.

The previous prime is 1221109973. The next prime is 1221110071. The reversal of 1221110022 is 2200111221.

It is an interprime number because it is at equal distance from previous prime (1221109973) and next prime (1221110071).

It is a super-2 number, since 2×1221110022² = 2982219371657680968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97798 + ... + 109574.

It is an arithmetic number, because the mean of its divisors is an integer number (83317572).

Almost surely, 2^1221110022 is an apocalyptic number.

1221110022 is an abundant number, since it is smaller than the sum of its proper divisors (1445052282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221110022 is a wasteful number, since it uses less digits than its factorization.

1221110022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13364.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1221110022 is about 34944.3846991187. The cubic root of 1221110022 is about 1068.8537006315.

Adding to 1221110022 its reverse (2200111221), we get a palindrome (3421221243).

The spelling of 1221110022 in words is "one billion, two hundred twenty-one million, one hundred ten thousand, twenty-two".