1251042101201 has 4 divisors (see below), whose sum is σ = 1252129019904. Its totient is φ = 1249955182500.

The previous prime is 1251042101173. The next prime is 1251042101233. The reversal of 1251042101201 is 1021012401521.

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 1251042101201 - 2¹⁰ = 1251042100177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251042101291) 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, 543457625 + ... + 543459926.

It is an arithmetic number, because the mean of its divisors is an integer number (313032254976).

Almost surely, 2^{1251042101201} is an apocalyptic number.

It is an amenable number.

1251042101201 is a deficient number, since it is larger than the sum of its proper divisors (1086918703).

1251042101201 is a wasteful number, since it uses less digits than its factorization.

1251042101201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086918702.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 1251042101201 its reverse (1021012401521), we get a palindrome (2272054502722).

The spelling of 1251042101201 in words is "one trillion, two hundred fifty-one billion, forty-two million, one hundred one thousand, two hundred one".