10210001021 has 8 divisors (see below), whose sum is σ = 11149104288. Its totient is φ = 9272718000.

The previous prime is 10210000991. The next prime is 10210001023. The reversal of 10210001021 is 12010001201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10210001021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10210001023) 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, 443315 + ... + 465776.

It is an arithmetic number, because the mean of its divisors is an integer number (1393638036).

Almost surely, 2^10210001021 is an apocalyptic number.

10210001021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10210001021 is a deficient number, since it is larger than the sum of its proper divisors (939103267).

10210001021 is a wasteful number, since it uses less digits than its factorization.

10210001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910123.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 10210001021 its reverse (12010001201), we get a palindrome (22220002222).

The spelling of 10210001021 in words is "ten billion, two hundred ten million, one thousand, twenty-one".