21121201123012 has 48 divisors (see below), whose sum is σ = 37081132905600. Its totient is φ = 10526661649152.

The previous prime is 21121201122953. The next prime is 21121201123051. The reversal of 21121201123012 is 21032110212112.

It is a super-2 number, since 2×21121201123012² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6484862088 + ... + 6484865344.

It is an arithmetic number, because the mean of its divisors is an integer number (772523602200).

Almost surely, 2^{21121201123012} is an apocalyptic number.

It is an amenable number.

21121201123012 is a deficient number, since it is larger than the sum of its proper divisors (15959931782588).

21121201123012 is a wasteful number, since it uses less digits than its factorization.

21121201123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180 (or 7178 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21121201123012 its reverse (21032110212112), we get a palindrome (42153311335124).

The spelling of 21121201123012 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred one million, one hundred twenty-three thousand, twelve".