10021121001 has 12 divisors (see below), whose sum is σ = 14477229312. Its totient is φ = 6679696536.

The previous prime is 10021120997. The next prime is 10021121003. The reversal of 10021121001 is 10012112001.

It is a happy number.

10021121001 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10021121001 - 2² = 10021120997 is a prime.

It is a super-2 number, since 2×10021121001² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (10021121003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24801 + ... + 143726.

It is an arithmetic number, because the mean of its divisors is an integer number (1206435776).

Almost surely, 2^10021121001 is an apocalyptic number.

It is an amenable number.

10021121001 is a deficient number, since it is larger than the sum of its proper divisors (4456108311).

10021121001 is a wasteful number, since it uses less digits than its factorization.

10021121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175140 (or 175137 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10021121001 its reverse (10012112001), we get a palindrome (20033233002).

The spelling of 10021121001 in words is "ten billion, twenty-one million, one hundred twenty-one thousand, one".