10021201011 has 20 divisors (see below), whose sum is σ = 15048342144. Its totient is φ = 6645812400.

The previous prime is 10021200979. The next prime is 10021201013. The reversal of 10021201011 is 11010212001.

It is a happy number.

It is not a de Polignac number, because 10021201011 - 2⁵ = 10021200979 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 10021200984 and 10021201002.

It is not an unprimeable number, because it can be changed into a prime (10021201013) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 308400 + ... + 339341.

Almost surely, 2^10021201011 is an apocalyptic number.

10021201011 is a deficient number, since it is larger than the sum of its proper divisors (5027141133).

10021201011 is an equidigital number, since it uses as much as digits as its factorization.

10021201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647944 (or 647935 counting only the distinct ones).

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

Adding to 10021201011 its reverse (11010212001), we get a palindrome (21031413012).

The spelling of 10021201011 in words is "ten billion, twenty-one million, two hundred one thousand, eleven".