1221112202 has 4 divisors (see below), whose sum is σ = 1831668306. Its totient is φ = 610556100.

The previous prime is 1221112201. The next prime is 1221112241. The reversal of 1221112202 is 2022111221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 737068201 + 484044001 = 27149^2 + 22001^2 .

It is a super-2 number, since 2×1221112202² = 2982230019746577608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221112201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305278049 + ... + 305278052.

Almost surely, 2^1221112202 is an apocalyptic number.

1221112202 is a deficient number, since it is larger than the sum of its proper divisors (610556104).

1221112202 is an equidigital number, since it uses as much as digits as its factorization.

1221112202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610556103.

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

The square root of 1221112202 is about 34944.4158915269. The cubic root of 1221112202 is about 1068.8543366920.

Adding to 1221112202 its reverse (2022111221), we get a palindrome (3243223423).

The spelling of 1221112202 in words is "one billion, two hundred twenty-one million, one hundred twelve thousand, two hundred two".