1021412213 has 4 divisors (see below), whose sum is σ = 1046324748. Its totient is φ = 996499680.

The previous prime is 1021412209. The next prime is 1021412303. The reversal of 1021412213 is 3122141201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 151339204 + 870073009 = 12302^2 + 29497^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021412213 - 2² = 1021412209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021412191 and 1021412200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021411213) 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, 12456206 + ... + 12456287.

It is an arithmetic number, because the mean of its divisors is an integer number (261581187).

Almost surely, 2^1021412213 is an apocalyptic number.

It is an amenable number.

1021412213 is a deficient number, since it is larger than the sum of its proper divisors (24912535).

1021412213 is an equidigital number, since it uses as much as digits as its factorization.

1021412213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24912534.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1021412213 is about 31959.5402501350. The cubic root of 1021412213 is about 1007.0870592717.

Adding to 1021412213 its reverse (3122141201), we get a palindrome (4143553414).

The spelling of 1021412213 in words is "one billion, twenty-one million, four hundred twelve thousand, two hundred thirteen".