21131121210033 has 8 divisors (see below), whose sum is σ = 28183368708000. Its totient is φ = 14083143926048.

The previous prime is 21131121210019. The next prime is 21131121210037. The reversal of 21131121210033 is 33001212113112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21131121210033 - 2¹⁸ = 21131120947889 is a prime.

It is a super-2 number, since 2×21131121210033² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21131121209991 and 21131121210009.

It is not an unprimeable number, because it can be changed into a prime (21131121210037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1067541948 + ... + 1067561741.

It is an arithmetic number, because the mean of its divisors is an integer number (3522921088500).

Almost surely, 2^{21131121210033} is an apocalyptic number.

It is an amenable number.

21131121210033 is a deficient number, since it is larger than the sum of its proper divisors (7052247497967).

21131121210033 is a wasteful number, since it uses less digits than its factorization.

21131121210033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135106991.

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

Adding to 21131121210033 its reverse (33001212113112), we get a palindrome (54132333323145).

The spelling of 21131121210033 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred twenty-one million, two hundred ten thousand, thirty-three".