10001212220201 has 4 divisors (see below), whose sum is σ = 10003783890900. Its totient is φ = 9998640549504.

The previous prime is 10001212220191. The next prime is 10001212220227. The reversal of 10001212220201 is 10202221210001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7615806105625 + 2385406114576 = 2759675^2 + 1544476^2 .

It is a cyclic number.

It is not a de Polignac number, because 10001212220201 - 2³⁴ = 9984032351017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10001212220231) 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, 1285829516 + ... + 1285837293.

It is an arithmetic number, because the mean of its divisors is an integer number (2500945972725).

Almost surely, 2^{10001212220201} is an apocalyptic number.

It is an amenable number.

10001212220201 is a deficient number, since it is larger than the sum of its proper divisors (2571670699).

10001212220201 is an equidigital number, since it uses as much as digits as its factorization.

10001212220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571670698.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10001212220201 its reverse (10202221210001), we get a palindrome (20203433430202).

The spelling of 10001212220201 in words is "ten trillion, one billion, two hundred twelve million, two hundred twenty thousand, two hundred one".