1011201100021 has 32 divisors (see below), whose sum is σ = 1199446560000. Its totient is φ = 834102807552.

The previous prime is 1011201100009. The next prime is 1011201100099. The reversal of 1011201100021 is 1200011021101.

It is not a de Polignac number, because 1011201100021 - 2¹⁷ = 1011200968949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011201099980 and 1011201100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011201100121) 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 31 ways as a sum of consecutive naturals, for example, 134161165 + ... + 134168701.

It is an arithmetic number, because the mean of its divisors is an integer number (37482705000).

Almost surely, 2^{1011201100021} is an apocalyptic number.

It is an amenable number.

1011201100021 is a deficient number, since it is larger than the sum of its proper divisors (188245459979).

1011201100021 is a wasteful number, since it uses less digits than its factorization.

1011201100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9661.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1011201100021 its reverse (1200011021101), we get a palindrome (2211212121122).

The spelling of 1011201100021 in words is "one trillion, eleven billion, two hundred one million, one hundred thousand, twenty-one".