20210201001 has 32 divisors (see below), whose sum is σ = 31861728000. Its totient is φ = 12617130240.

The previous prime is 20210200987. The next prime is 20210201009. The reversal of 20210201001 is 10010201202.

It is not a de Polignac number, because 20210201001 - 2¹⁵ = 20210168233 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20210201009) 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, 19290 + ... + 201971.

It is an arithmetic number, because the mean of its divisors is an integer number (995679000).

Almost surely, 2^20210201001 is an apocalyptic number.

It is an amenable number.

20210201001 is a deficient number, since it is larger than the sum of its proper divisors (11651526999).

20210201001 is a wasteful number, since it uses less digits than its factorization.

20210201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221486 (or 221480 counting only the distinct ones).

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

Adding to 20210201001 its reverse (10010201202), we get a palindrome (30220402203).

The spelling of 20210201001 in words is "twenty billion, two hundred ten million, two hundred one thousand, one".