210121133023011 has 32 divisors (see below), whose sum is σ = 321846651929088. Its totient is φ = 119446865982720.

The previous prime is 210121133023003. The next prime is 210121133023027. The reversal of 210121133023011 is 110320331121012.

It is not a de Polignac number, because 210121133023011 - 2³ = 210121133023003 is a prime.

It is a super-2 number, since 2×210121133023011² (a number of 29 digits) contains 22 as substring.

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 (210121133023051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13757085 + ... + 24688046.

It is an arithmetic number, because the mean of its divisors is an integer number (10057707872784).

Almost surely, 2^{210121133023011} is an apocalyptic number.

210121133023011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

210121133023011 is a deficient number, since it is larger than the sum of its proper divisors (111725518906077).

210121133023011 is a wasteful number, since it uses less digits than its factorization.

210121133023011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38446491.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 210121133023011 its reverse (110320331121012), we get a palindrome (320441464144023).

The spelling of 210121133023011 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred thirty-three million, twenty-three thousand, eleven".