21010021201101 has 24 divisors (see below), whose sum is σ = 28624867694784. Its totient is φ = 13707327332800.

The previous prime is 21010021201093. The next prime is 21010021201109. The reversal of 21010021201101 is 10110212001012.

It is an interprime number because it is at equal distance from previous prime (21010021201093) and next prime (21010021201109).

It is not a de Polignac number, because 21010021201101 - 2³ = 21010021201093 is a prime.

It is a super-2 number, since 2×21010021201101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010021201109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70103296 + ... + 70402358.

It is an arithmetic number, because the mean of its divisors is an integer number (1192702820616).

Almost surely, 2^{21010021201101} is an apocalyptic number.

It is an amenable number.

21010021201101 is a deficient number, since it is larger than the sum of its proper divisors (7614846493683).

21010021201101 is a wasteful number, since it uses less digits than its factorization.

21010021201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309761 (or 309714 counting only the distinct ones).

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

Adding to 21010021201101 its reverse (10110212001012), we get a palindrome (31120233202113).

The spelling of 21010021201101 in words is "twenty-one trillion, ten billion, twenty-one million, two hundred one thousand, one hundred one".