20012201001 has 48 divisors (see below), whose sum is σ = 32251914240. Its totient is φ = 11874314880.

The previous prime is 20012200979. The next prime is 20012201023. The reversal of 20012201001 is 10010221002.

It is an interprime number because it is at equal distance from previous prime (20012200979) and next prime (20012201023).

It is not a de Polignac number, because 20012201001 - 2⁹ = 20012200489 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (20012201081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 994720 + ... + 1014638.

It is an arithmetic number, because the mean of its divisors is an integer number (671914880).

Almost surely, 2^20012201001 is an apocalyptic number.

It is an amenable number.

20012201001 is a deficient number, since it is larger than the sum of its proper divisors (12239713239).

20012201001 is a wasteful number, since it uses less digits than its factorization.

20012201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20246 (or 20243 counting only the distinct ones).

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

Adding to 20012201001 its reverse (10010221002), we get a palindrome (30022422003).

The spelling of 20012201001 in words is "twenty billion, twelve million, two hundred one thousand, one".