1021123245 has 32 divisors (see below), whose sum is σ = 1682601984. Its totient is φ = 528473600.

The previous prime is 1021123211. The next prime is 1021123333. The reversal of 1021123245 is 5423211201.

It is not a de Polignac number, because 1021123245 - 2¹⁷ = 1020992173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113119 + ... + 121811.

It is an arithmetic number, because the mean of its divisors is an integer number (52581312).

Almost surely, 2^1021123245 is an apocalyptic number.

1021123245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021123245 is a deficient number, since it is larger than the sum of its proper divisors (661478739).

1021123245 is a wasteful number, since it uses less digits than its factorization.

1021123245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8933.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1021123245 is about 31955.0190893387. The cubic root of 1021123245 is about 1006.9920785585.

Adding to 1021123245 its reverse (5423211201), we get a palindrome (6444334446).

The spelling of 1021123245 in words is "one billion, twenty-one million, one hundred twenty-three thousand, two hundred forty-five".