1021110021001 has 64 divisors (see below), whose sum is σ = 1278083197440. Its totient is φ = 796050063360.

The previous prime is 1021110020999. The next prime is 1021110021017. The reversal of 1021110021001 is 1001200111201.

It is a cyclic number.

It is not a de Polignac number, because 1021110021001 - 2¹ = 1021110020999 is a prime.

It is a super-2 number, since 2×1021110021001² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021110021101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97867881 + ... + 97878313.

It is an arithmetic number, because the mean of its divisors is an integer number (19970049960).

Almost surely, 2^{1021110021001} is an apocalyptic number.

It is an amenable number.

1021110021001 is a deficient number, since it is larger than the sum of its proper divisors (256973176439).

1021110021001 is a wasteful number, since it uses less digits than its factorization.

1021110021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10754.

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

Adding to 1021110021001 its reverse (1001200111201), we get a palindrome (2022310132202).

The spelling of 1021110021001 in words is "one trillion, twenty-one billion, one hundred ten million, twenty-one thousand, one".