1051211217 has 8 divisors (see below), whose sum is σ = 1601845696. Its totient is φ = 600692112.

The previous prime is 1051211191. The next prime is 1051211237. The reversal of 1051211217 is 7121121501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1051211217 - 2¹¹ = 1051209169 is a prime.

It is a super-2 number, since 2×1051211217² = 2210090045493242178, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 50057677 = 1051211217 / (1 + 0 + 5 + 1 + 2 + 1 + 1 + 2 + 1 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1051211193 and 1051211202.

It is not an unprimeable number, because it can be changed into a prime (1051211237) 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, 25028818 + ... + 25028859.

It is an arithmetic number, because the mean of its divisors is an integer number (200230712).

Almost surely, 2^1051211217 is an apocalyptic number.

It is an amenable number.

1051211217 is a deficient number, since it is larger than the sum of its proper divisors (550634479).

1051211217 is an equidigital number, since it uses as much as digits as its factorization.

1051211217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50057687.

The product of its (nonzero) digits is 140, while the sum is 21.

The square root of 1051211217 is about 32422.3875894420. The cubic root of 1051211217 is about 1016.7870245875.

Adding to 1051211217 its reverse (7121121501), we get a palindrome (8172332718).

The spelling of 1051211217 in words is "one billion, fifty-one million, two hundred eleven thousand, two hundred seventeen".