21232101010121 has 16 divisors (see below), whose sum is σ = 22184573580288. Its totient is φ = 20282077846800.

The previous prime is 21232101010093. The next prime is 21232101010139. The reversal of 21232101010121 is 12101010123212.

It is a happy number.

21232101010121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 21232101010121 - 2¹⁴ = 21232100993737 is a prime.

It is a super-2 number, since 2×21232101010121² (a number of 27 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21232101010121.

It is not an unprimeable number, because it can be changed into a prime (21232101010181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232949060 + ... + 233040186.

It is an arithmetic number, because the mean of its divisors is an integer number (1386535848768).

Almost surely, 2^{21232101010121} is an apocalyptic number.

It is an amenable number.

21232101010121 is a deficient number, since it is larger than the sum of its proper divisors (952472570167).

21232101010121 is a wasteful number, since it uses less digits than its factorization.

21232101010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104452.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21232101010121 its reverse (12101010123212), we get a palindrome (33333111133333).

The spelling of 21232101010121 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred one million, ten thousand, one hundred twenty-one".