10201021011 has 10 divisors (see below), whose sum is σ = 15238562372. Its totient is φ = 6800680620.

The previous prime is 10201021001. The next prime is 10201021049. The reversal of 10201021011 is 11012010201.

It is a happy number.

It is not a de Polignac number, because 10201021011 - 2⁷ = 10201020883 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10201020984 and 10201021002.

It is not an unprimeable number, because it can be changed into a prime (10201021001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 62969185 + ... + 62969346.

Almost surely, 2^10201021011 is an apocalyptic number.

10201021011 is a deficient number, since it is larger than the sum of its proper divisors (5037541361).

10201021011 is an equidigital number, since it uses as much as digits as its factorization.

10201021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125938543 (or 125938534 counting only the distinct ones).

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

Adding to 10201021011 its reverse (11012010201), we get a palindrome (21213031212).

The spelling of 10201021011 in words is "ten billion, two hundred one million, twenty-one thousand, eleven".