1021200111011 has 8 divisors (see below), whose sum is σ = 1023947171520. Its totient is φ = 1018456650792.

The previous prime is 1021200110993. The next prime is 1021200111049. The reversal of 1021200111011 is 1101110021201.

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

It is a cyclic number.

It is not a de Polignac number, because 1021200111011 - 2¹⁰ = 1021200109987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021200110983 and 1021200111001.

It is not an unprimeable number, because it can be changed into a prime (1021200111091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331541 + ... + 1467078.

It is an arithmetic number, because the mean of its divisors is an integer number (127993396440).

Almost surely, 2^{1021200111011} is an apocalyptic number.

1021200111011 is a deficient number, since it is larger than the sum of its proper divisors (2747060509).

1021200111011 is an equidigital number, since it uses as much as digits as its factorization.

1021200111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800145.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1021200111011 its reverse (1101110021201), we get a palindrome (2122310132212).

The spelling of 1021200111011 in words is "one trillion, twenty-one billion, two hundred million, one hundred eleven thousand, eleven".