21121333361000 has 32 divisors (see below), whose sum is σ = 49423920067080. Its totient is φ = 8448533344000.

The previous prime is 21121333360973. The next prime is 21121333361003. The reversal of 21121333361000 is 16333312112.

It can be written as a sum of positive squares in 4 ways, for example, as 10771510872004 + 10349822488996 = 3281998^2 + 3217114^2 .

It is a super-2 number, since 2×21121333361000² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121333361003) 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, 10560665681 + ... + 10560667680.

Almost surely, 2^{21121333361000} is an apocalyptic number.

21121333361000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121333361000 is an abundant number, since it is smaller than the sum of its proper divisors (28302586706080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121333361000 is a wasteful number, since it uses less digits than its factorization.

21121333361000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21121333382 (or 21121333368 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21121333361000 its reverse (16333312112), we get a palindrome (21137666673112).

The spelling of 21121333361000 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred thirty-three million, three hundred sixty-one thousand".