20010021201 has 12 divisors (see below), whose sum is σ = 28904786560. Its totient is φ = 13339357560.

The previous prime is 20010021197. The next prime is 20010021203. The reversal of 20010021201 is 10212001002.

It is not a de Polignac number, because 20010021201 - 2² = 20010021197 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 not an unprimeable number, because it can be changed into a prime (20010021203) 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, 201396 + ... + 283866.

Almost surely, 2^20010021201 is an apocalyptic number.

It is an amenable number.

20010021201 is a deficient number, since it is larger than the sum of its proper divisors (8894765359).

20010021201 is a wasteful number, since it uses less digits than its factorization.

20010021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109436 (or 109433 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20010021201 its reverse (10212001002), we get a palindrome (30222022203).

The spelling of 20010021201 in words is "twenty billion, ten million, twenty-one thousand, two hundred one".