1020211123 has 4 divisors (see below), whose sum is σ = 1080223560. Its totient is φ = 960198688.

The previous prime is 1020211117. The next prime is 1020211133. The reversal of 1020211123 is 3211120201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020211123 is a prime.

It is a super-2 number, since 2×1020211123² = 2081661470985842258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020211133) 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, 30006193 + ... + 30006226.

It is an arithmetic number, because the mean of its divisors is an integer number (270055890).

Almost surely, 2^1020211123 is an apocalyptic number.

1020211123 is a deficient number, since it is larger than the sum of its proper divisors (60012437).

1020211123 is an equidigital number, since it uses as much as digits as its factorization.

1020211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60012436.

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

The square root of 1020211123 is about 31940.7439331021. The cubic root of 1020211123 is about 1006.6921561435.

Adding to 1020211123 its reverse (3211120201), we get a palindrome (4231331324).

The spelling of 1020211123 in words is "one billion, twenty million, two hundred eleven thousand, one hundred twenty-three".