1023012211 has 4 divisors (see below), whose sum is σ = 1101705472. Its totient is φ = 944318952.

The previous prime is 1023012203. The next prime is 1023012227. The reversal of 1023012211 is 1122103201.

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 1023012211 - 2³ = 1023012203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 78693247 = 1023012211 / (1 + 0 + 2 + 3 + 0 + 1 + 2 + 2 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023012191 and 1023012200.

It is not an unprimeable number, because it can be changed into a prime (1023012251) 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, 39346611 + ... + 39346636.

It is an arithmetic number, because the mean of its divisors is an integer number (275426368).

Almost surely, 2^1023012211 is an apocalyptic number.

1023012211 is a deficient number, since it is larger than the sum of its proper divisors (78693261).

1023012211 is an equidigital number, since it uses as much as digits as its factorization.

1023012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78693260.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1023012211 is about 31984.5620729751. The cubic root of 1023012211 is about 1007.6126376909.

Adding to 1023012211 its reverse (1122103201), we get a palindrome (2145115412).

The spelling of 1023012211 in words is "one billion, twenty-three million, twelve thousand, two hundred eleven".