1021200120011 has 8 divisors (see below), whose sum is σ = 1028077927344. Its totient is φ = 1014344826880.

The previous prime is 1021200120001. The next prime is 1021200120019. The reversal of 1021200120011 is 1100210021201.

1021200120011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021200120011 is a prime.

It is a super-2 number, since 2×1021200120011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021200119974 and 1021200120001.

It is not an unprimeable number, because it can be changed into a prime (1021200120019) 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, 5537525 + ... + 5718966.

It is an arithmetic number, because the mean of its divisors is an integer number (128509740918).

Almost surely, 2^{1021200120011} is an apocalyptic number.

1021200120011 is a deficient number, since it is larger than the sum of its proper divisors (6877807333).

1021200120011 is a wasteful number, since it uses less digits than its factorization.

1021200120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11257101.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021200120011 its reverse (1100210021201), we get a palindrome (2121410141212).

The spelling of 1021200120011 in words is "one trillion, twenty-one billion, two hundred million, one hundred twenty thousand, eleven".