123021001 has 4 divisors (see below), whose sum is σ = 123048400. Its totient is φ = 122993604.

The previous prime is 123020983. The next prime is 123021007. The reversal of 123021001 is 100120321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100120321 = 7 ⋅14302903.

It is a cyclic number.

It is not a de Polignac number, because 123021001 - 2²¹ = 120923849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123021007) 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, 5211 + ... + 16528.

It is an arithmetic number, because the mean of its divisors is an integer number (30762100).

Almost surely, 2^123021001 is an apocalyptic number.

It is an amenable number.

123021001 is a deficient number, since it is larger than the sum of its proper divisors (27399).

123021001 is an equidigital number, since it uses as much as digits as its factorization.

123021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27398.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 123021001 is about 11091.4832641987. The cubic root of 123021001 is about 497.3472857703.

Adding to 123021001 its reverse (100120321), we get a palindrome (223141322).

The spelling of 123021001 in words is "one hundred twenty-three million, twenty-one thousand, one".