133021123 has 4 divisors (see below), whose sum is σ = 133143480. Its totient is φ = 132898768.

The previous prime is 133021099. The next prime is 133021153. The reversal of 133021123 is 321120331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321120331 = 7 ⋅45874333.

It is a cyclic number.

It is not a de Polignac number, because 133021123 - 2⁹ = 133020611 is a prime.

It is a super-2 number, since 2×133021123² = 35389238328362258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133021097 and 133021106.

It is not an unprimeable number, because it can be changed into a prime (133021153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59533 + ... + 61726.

It is an arithmetic number, because the mean of its divisors is an integer number (33285870).

Almost surely, 2^133021123 is an apocalyptic number.

133021123 is a deficient number, since it is larger than the sum of its proper divisors (122357).

133021123 is a wasteful number, since it uses less digits than its factorization.

133021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122356.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 133021123 is about 11533.4783565063. The cubic root of 133021123 is about 510.4738937503.

Adding to 133021123 its reverse (321120331), we get a palindrome (454141454).

The spelling of 133021123 in words is "one hundred thirty-three million, twenty-one thousand, one hundred twenty-three".