21121013313002 has 4 divisors (see below), whose sum is σ = 31681519969506. Its totient is φ = 10560506656500.

The previous prime is 21121013312977. The next prime is 21121013313041. The reversal of 21121013313002 is 20031331012112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17471572369801 + 3649440943201 = 4179901^2 + 1910351^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5280253328249 + ... + 5280253328252.

Almost surely, 2^{21121013313002} is an apocalyptic number.

21121013313002 is a deficient number, since it is larger than the sum of its proper divisors (10560506656504).

21121013313002 is a wasteful number, since it uses less digits than its factorization.

21121013313002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560506656503.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21121013313002 its reverse (20031331012112), we get a palindrome (41152344325114).

The spelling of 21121013313002 in words is "twenty-one trillion, one hundred twenty-one billion, thirteen million, three hundred thirteen thousand, two".