1021101201021 has 12 divisors (see below), whose sum is σ = 1496489914976. Its totient is φ = 618849212520.

The previous prime is 1021101201017. The next prime is 1021101201031. The reversal of 1021101201021 is 1201021011201.

It is not a de Polignac number, because 1021101201021 - 2² = 1021101201017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021101200988 and 1021101201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021101201031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1406475121 + ... + 1406475846.

Almost surely, 2^{1021101201021} is an apocalyptic number.

1021101201021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021101201021 is a deficient number, since it is larger than the sum of its proper divisors (475388713955).

1021101201021 is a wasteful number, since it uses less digits than its factorization.

1021101201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812950992 (or 2812950981 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1021101201021 its reverse (1201021011201), we get a palindrome (2222122212222).

The spelling of 1021101201021 in words is "one trillion, twenty-one billion, one hundred one million, two hundred one thousand, twenty-one".