1051231115501 has 4 divisors (see below), whose sum is σ = 1201406989152. Its totient is φ = 901055241852.

The previous prime is 1051231115489. The next prime is 1051231115509. The reversal of 1051231115501 is 1055111321501.

It is a happy number.

1051231115501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1051231115501 - 2⁶ = 1051231115437 is a prime.

It is a super-2 number, since 2×1051231115501² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051231115509) 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, 75087936815 + ... + 75087936828.

It is an arithmetic number, because the mean of its divisors is an integer number (300351747288).

Almost surely, 2^{1051231115501} is an apocalyptic number.

It is an amenable number.

1051231115501 is a deficient number, since it is larger than the sum of its proper divisors (150175873651).

1051231115501 is an equidigital number, since it uses as much as digits as its factorization.

1051231115501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150175873650.

The product of its (nonzero) digits is 750, while the sum is 26.

The spelling of 1051231115501 in words is "one trillion, fifty-one billion, two hundred thirty-one million, one hundred fifteen thousand, five hundred one".