1021201020011 has 8 divisors (see below), whose sum is σ = 1025622074784. Its totient is φ = 1016785546560.

The previous prime is 1021201019989. The next prime is 1021201020101. The reversal of 1021201020011 is 1100201021201.

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-1021201020011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021201019974 and 1021201020001.

It is not an unprimeable number, because it can be changed into a prime (1021201020311) 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, 1028396 + ... + 1760681.

It is an arithmetic number, because the mean of its divisors is an integer number (128202759348).

Almost surely, 2^{1021201020011} is an apocalyptic number.

1021201020011 is a deficient number, since it is larger than the sum of its proper divisors (4421054773).

1021201020011 is a wasteful number, since it uses less digits than its factorization.

1021201020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790661.

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

Adding to 1021201020011 its reverse (1100201021201), we get a palindrome (2121402041212).

The spelling of 1021201020011 in words is "one trillion, twenty-one billion, two hundred one million, twenty thousand, eleven".