10001122021 has 8 divisors (see below), whose sum is σ = 11000484288. Its totient is φ = 9091927900.

The previous prime is 10001122013. The next prime is 10001122031. The reversal of 10001122021 is 12022110001.

It is not a de Polignac number, because 10001122021 - 2³ = 10001122013 is a prime.

It is a super-2 number, since 2×10001122021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001121989 and 10001122007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001122031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3755665 + ... + 3758326.

It is an arithmetic number, because the mean of its divisors is an integer number (1375060536).

Almost surely, 2^10001122021 is an apocalyptic number.

10001122021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10001122021 is a deficient number, since it is larger than the sum of its proper divisors (999362267).

10001122021 is an frugal number, since it uses more digits than its factorization.

10001122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7514024 (or 7514002 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10001122021 its reverse (12022110001), we get a palindrome (22023232022).

The spelling of 10001122021 in words is "ten billion, one million, one hundred twenty-two thousand, twenty-one".