1210222421 has 8 divisors (see below), whose sum is σ = 1216471200. Its totient is φ = 1203990480.

The previous prime is 1210222399. The next prime is 1210222451. The reversal of 1210222421 is 1242220121.

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 1210222421 - 2¹⁴ = 1210206037 is a prime.

It is a super-2 number, since 2×1210222421² = 2929276616582202482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210222421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210222451) 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, 154991 + ... + 162611.

It is an arithmetic number, because the mean of its divisors is an integer number (152058900).

Almost surely, 2^1210222421 is an apocalyptic number.

It is an amenable number.

1210222421 is a deficient number, since it is larger than the sum of its proper divisors (6248779).

1210222421 is an equidigital number, since it uses as much as digits as its factorization.

1210222421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8419.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1210222421 is about 34788.2511920332. The cubic root of 1210222421 is about 1065.6675254151.

Adding to 1210222421 its reverse (1242220121), we get a palindrome (2452442542).

The spelling of 1210222421 in words is "one billion, two hundred ten million, two hundred twenty-two thousand, four hundred twenty-one".