20122001001 has 24 divisors (see below), whose sum is σ = 29491338240. Its totient is φ = 13218784416.

The previous prime is 20122000993. The next prime is 20122001021. The reversal of 20122001001 is 10010022102.

It is not a de Polignac number, because 20122001001 - 2³ = 20122000993 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 (20122001021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255960 + ... + 325206.

It is an arithmetic number, because the mean of its divisors is an integer number (1228805760).

Almost surely, 2^20122001001 is an apocalyptic number.

It is an amenable number.

20122001001 is a deficient number, since it is larger than the sum of its proper divisors (9369337239).

20122001001 is a wasteful number, since it uses less digits than its factorization.

20122001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69725 (or 69722 counting only the distinct ones).

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

Adding to 20122001001 its reverse (10010022102), we get a palindrome (30132023103).

The spelling of 20122001001 in words is "twenty billion, one hundred twenty-two million, one thousand, one".