1157203153021 has 4 divisors (see below), whose sum is σ = 1157558453532. Its totient is φ = 1156847852512.

The previous prime is 1157203153003. The next prime is 1157203153031. The reversal of 1157203153021 is 1203513027511.

It is a happy number.

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 1014310836900 + 142892316121 = 1007130^2 + 378011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157203153021 - 2³¹ = 1155055669373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157203153031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177645370 + ... + 177651883.

It is an arithmetic number, because the mean of its divisors is an integer number (289389613383).

Almost surely, 2^{1157203153021} is an apocalyptic number.

It is an amenable number.

1157203153021 is a deficient number, since it is larger than the sum of its proper divisors (355300511).

1157203153021 is an equidigital number, since it uses as much as digits as its factorization.

1157203153021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355300510.

The product of its (nonzero) digits is 6300, while the sum is 31.

The spelling of 1157203153021 in words is "one trillion, one hundred fifty-seven billion, two hundred three million, one hundred fifty-three thousand, twenty-one".