21121111300002 has 64 divisors (see below), whose sum is σ = 49583178998784. Its totient is φ = 5871319439040.

The previous prime is 21121111299949. The next prime is 21121111300007. The reversal of 21121111300002 is 20000311112112.

It is a super-2 number, since 2×21121111300002² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121111300007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52965253 + ... + 53362535.

It is an arithmetic number, because the mean of its divisors is an integer number (774737171856).

Almost surely, 2^{21121111300002} is an apocalyptic number.

21121111300002 is an abundant number, since it is smaller than the sum of its proper divisors (28462067698782).

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

21121111300002 is a wasteful number, since it uses less digits than its factorization.

21121111300002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431543.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21121111300002 its reverse (20000311112112), we get a palindrome (41121422412114).

The spelling of 21121111300002 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred eleven million, three hundred thousand, two".