1212202223 has 4 divisors (see below), whose sum is σ = 1276002360. Its totient is φ = 1148402088.

The previous prime is 1212202219. The next prime is 1212202231. The reversal of 1212202223 is 3222022121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212202223 - 2² = 1212202219 is a prime.

It is a super-2 number, since 2×1212202223² = 2938868458892283458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212202213) 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, 31900040 + ... + 31900077.

It is an arithmetic number, because the mean of its divisors is an integer number (319000590).

Almost surely, 2^1212202223 is an apocalyptic number.

1212202223 is a deficient number, since it is larger than the sum of its proper divisors (63800137).

1212202223 is an equidigital number, since it uses as much as digits as its factorization.

1212202223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63800136.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1212202223 is about 34816.6946018717. The cubic root of 1212202223 is about 1066.2483170742.

Adding to 1212202223 its reverse (3222022121), we get a palindrome (4434224344).

The spelling of 1212202223 in words is "one billion, two hundred twelve million, two hundred two thousand, two hundred twenty-three".