210121133001 has 16 divisors (see below), whose sum is σ = 301722349824. Its totient is φ = 129301046784.

The previous prime is 210121132973. The next prime is 210121133021. The reversal of 210121133001 is 100331121012.

It is a happy number.

It is not a de Polignac number, because 210121133001 - 2⁶ = 210121132937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210121133021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1442425 + ... + 1581401.

It is an arithmetic number, because the mean of its divisors is an integer number (18857646864).

Almost surely, 2^210121133001 is an apocalyptic number.

It is an amenable number.

210121133001 is a deficient number, since it is larger than the sum of its proper divisors (91601216823).

210121133001 is a wasteful number, since it uses less digits than its factorization.

210121133001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177760.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 210121133001 its reverse (100331121012), we get a palindrome (310452254013).

The spelling of 210121133001 in words is "two hundred ten billion, one hundred twenty-one million, one hundred thirty-three thousand, one".