1251201535041 has 4 divisors (see below), whose sum is σ = 1668268713392. Its totient is φ = 834134356692.

The previous prime is 1251201535027. The next prime is 1251201535081. The reversal of 1251201535041 is 1405351021521.

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 1251201535041 - 2⁶ = 1251201534977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251201535021) 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, 208533589171 + ... + 208533589176.

It is an arithmetic number, because the mean of its divisors is an integer number (417067178348).

Almost surely, 2^{1251201535041} is an apocalyptic number.

It is an amenable number.

1251201535041 is a deficient number, since it is larger than the sum of its proper divisors (417067178351).

1251201535041 is an equidigital number, since it uses as much as digits as its factorization.

1251201535041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417067178350.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 1251201535041 its reverse (1405351021521), we get a palindrome (2656552556562).

The spelling of 1251201535041 in words is "one trillion, two hundred fifty-one billion, two hundred one million, five hundred thirty-five thousand, forty-one".