1201210010001 has 24 divisors (see below), whose sum is σ = 1844464081824. Its totient is φ = 750697584000.

The previous prime is 1201210009981. The next prime is 1201210010081. The reversal of 1201210010001 is 1000100121021.

It is a happy number.

It is not a de Polignac number, because 1201210010001 - 2²² = 1201205815697 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 (1201210010081) 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, 15601131 + ... + 15677936.

It is an arithmetic number, because the mean of its divisors is an integer number (76852670076).

Almost surely, 2^{1201210010001} is an apocalyptic number.

It is an amenable number.

1201210010001 is a deficient number, since it is larger than the sum of its proper divisors (643254071823).

1201210010001 is a wasteful number, since it uses less digits than its factorization.

1201210010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31279341 (or 31279338 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1201210010001 its reverse (1000100121021), we get a palindrome (2201310131022).

The spelling of 1201210010001 in words is "one trillion, two hundred one billion, two hundred ten million, ten thousand, one".