21121330103313 has 16 divisors (see below), whose sum is σ = 31552257256896. Its totient is φ = 12454838389440.

The previous prime is 21121330103303. The next prime is 21121330103327. The reversal of 21121330103313 is 31330103312112.

It is not a de Polignac number, because 21121330103313 - 2⁶ = 21121330103249 is a prime.

It is a super-2 number, since 2×21121330103313² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121330103303) 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, 8649192106 + ... + 8649194547.

It is an arithmetic number, because the mean of its divisors is an integer number (1972016078556).

Almost surely, 2^{21121330103313} is an apocalyptic number.

It is an amenable number.

21121330103313 is a deficient number, since it is larger than the sum of its proper divisors (10430927153583).

21121330103313 is a wasteful number, since it uses less digits than its factorization.

21121330103313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17298386704.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21121330103313 its reverse (31330103312112), we get a palindrome (52451433415425).

The spelling of 21121330103313 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred thirty million, one hundred three thousand, three hundred thirteen".