21020011201 has 32 divisors (see below), whose sum is σ = 25642229760. Its totient is φ = 16830084096.

The previous prime is 21020011141. The next prime is 21020011219. The reversal of 21020011201 is 10211002012.

It is not a de Polignac number, because 21020011201 - 2⁷ = 21020011073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21020011261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6699105 + ... + 6702241.

It is an arithmetic number, because the mean of its divisors is an integer number (801319680).

Almost surely, 2^21020011201 is an apocalyptic number.

It is an amenable number.

21020011201 is a deficient number, since it is larger than the sum of its proper divisors (4622218559).

21020011201 is a wasteful number, since it uses less digits than its factorization.

21020011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853.

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

Adding to 21020011201 its reverse (10211002012), we get a palindrome (31231013213).

The spelling of 21020011201 in words is "twenty-one billion, twenty million, eleven thousand, two hundred one".