1151021213 has 2 divisors, whose sum is σ = 1151021214. Its totient is φ = 1151021212.

The previous prime is 1151021203. The next prime is 1151021219. The reversal of 1151021213 is 3121201511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1140953284 + 10067929 = 33778^2 + 3173^2 .

It is an emirp because it is prime and its reverse (3121201511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1151021213 - 2¹⁶ = 1150955677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1151021191 and 1151021200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151021219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575510606 + 575510607.

It is an arithmetic number, because the mean of its divisors is an integer number (575510607).

Almost surely, 2^1151021213 is an apocalyptic number.

It is an amenable number.

1151021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151021213 is an equidigital number, since it uses as much as digits as its factorization.

1151021213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1151021213 is about 33926.7035386582. The cubic root of 1151021213 is about 1047.9995814758. Note that the first 3 decimals are identical.

Adding to 1151021213 its reverse (3121201511), we get a palindrome (4272222724).

It can be divided in two parts, 11510 and 21213, that added together give a palindrome (32723).

The spelling of 1151021213 in words is "one billion, one hundred fifty-one million, twenty-one thousand, two hundred thirteen".