201012211201021 has 4 divisors (see below), whose sum is σ = 219286048582944. Its totient is φ = 182738373819100.

The previous prime is 201012211201013. The next prime is 201012211201037. The reversal of 201012211201021 is 120102112210102.

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 not a de Polignac number, because 201012211201021 - 2³ = 201012211201013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201012211200986 and 201012211201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201012211231021) 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, 9136918690945 + ... + 9136918690966.

It is an arithmetic number, because the mean of its divisors is an integer number (54821512145736).

Almost surely, 2^{201012211201021} is an apocalyptic number.

It is an amenable number.

201012211201021 is a deficient number, since it is larger than the sum of its proper divisors (18273837381923).

201012211201021 is a wasteful number, since it uses less digits than its factorization.

201012211201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18273837381922.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201012211201021 its reverse (120102112210102), we get a palindrome (321114323411123).

It can be divided in two parts, 20101 and 2211201021, that added together give a palindrome (2211221122).

The spelling of 201012211201021 in words is "two hundred one trillion, twelve billion, two hundred eleven million, two hundred one thousand, twenty-one".