100121232021321 has 32 divisors (see below), whose sum is σ = 152603425472256. Its totient is φ = 57197982240000.

The previous prime is 100121232021311. The next prime is 100121232021337. The reversal of 100121232021321 is 123120232121001.

It is not a de Polignac number, because 100121232021321 - 2⁵ = 100121232021289 is a prime.

It is a super-2 number, since 2×100121232021321² (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 (100121232021311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2344683271 + ... + 2344725971.

It is an arithmetic number, because the mean of its divisors is an integer number (4768857046008).

Almost surely, 2^{100121232021321} is an apocalyptic number.

It is an amenable number.

100121232021321 is a deficient number, since it is larger than the sum of its proper divisors (52482193450935).

100121232021321 is a wasteful number, since it uses less digits than its factorization.

100121232021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67713.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 100121232021321 its reverse (123120232121001), we get a palindrome (223241464142322).

The spelling of 100121232021321 in words is "one hundred trillion, one hundred twenty-one billion, two hundred thirty-two million, twenty-one thousand, three hundred twenty-one".