10721262021 has 16 divisors (see below), whose sum is σ = 14939168640. Its totient is φ = 6826374720.

The previous prime is 10721262017. The next prime is 10721262023. The reversal of 10721262021 is 12026212701.

It is not a de Polignac number, because 10721262021 - 2² = 10721262017 is a prime.

It is a super-2 number, since 2×10721262021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10721261982 and 10721262000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10721262023) 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 15 ways as a sum of consecutive naturals, for example, 71926 + ... + 163143.

It is an arithmetic number, because the mean of its divisors is an integer number (933698040).

Almost surely, 2^10721262021 is an apocalyptic number.

It is an amenable number.

10721262021 is a deficient number, since it is larger than the sum of its proper divisors (4217906619).

10721262021 is a wasteful number, since it uses less digits than its factorization.

10721262021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235756.

The product of its (nonzero) digits is 672, while the sum is 24.

Adding to 10721262021 its reverse (12026212701), we get a palindrome (22747474722).

The spelling of 10721262021 in words is "ten billion, seven hundred twenty-one million, two hundred sixty-two thousand, twenty-one".