201021422001 has 4 divisors (see below), whose sum is σ = 268028562672. Its totient is φ = 134014281332.

The previous prime is 201021421999. The next prime is 201021422029. The reversal of 201021422001 is 100224120102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201021422001 - 2¹ = 201021421999 is a prime.

It is a super-2 number, since 2×201021422001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201021422081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33503570331 + ... + 33503570336.

It is an arithmetic number, because the mean of its divisors is an integer number (67007140668).

Almost surely, 2^201021422001 is an apocalyptic number.

It is an amenable number.

201021422001 is a deficient number, since it is larger than the sum of its proper divisors (67007140671).

201021422001 is an equidigital number, since it uses as much as digits as its factorization.

201021422001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67007140670.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201021422001 its reverse (100224120102), we get a palindrome (301245542103).

The spelling of 201021422001 in words is "two hundred one billion, twenty-one million, four hundred twenty-two thousand, one".