133123202121 has 32 divisors (see below), whose sum is σ = 219067269120. Its totient is φ = 70023184704.

The previous prime is 133123202111. The next prime is 133123202131. The reversal of 133123202121 is 121202321331.

It is an interprime number because it is at equal distance from previous prime (133123202111) and next prime (133123202131).

It is not a de Polignac number, because 133123202121 - 2⁶ = 133123202057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (133123202111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 581145 + ... + 777158.

It is an arithmetic number, because the mean of its divisors is an integer number (6845852160).

Almost surely, 2^133123202121 is an apocalyptic number.

It is an amenable number.

133123202121 is a deficient number, since it is larger than the sum of its proper divisors (85944066999).

133123202121 is a wasteful number, since it uses less digits than its factorization.

133123202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358685.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 133123202121 its reverse (121202321331), we get a palindrome (254325523452).

The spelling of 133123202121 in words is "one hundred thirty-three billion, one hundred twenty-three million, two hundred two thousand, one hundred twenty-one".