1023151554121 has 4 divisors (see below), whose sum is σ = 1023154156692. Its totient is φ = 1023148951552.

The previous prime is 1023151554097. The next prime is 1023151554149. The reversal of 1023151554121 is 1214551513201.

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 635944046521 + 387207507600 = 797461^2 + 622260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023151554121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023151554221) 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, 577336 + ... + 1542601.

It is an arithmetic number, because the mean of its divisors is an integer number (255788539173).

Almost surely, 2^{1023151554121} is an apocalyptic number.

It is an amenable number.

1023151554121 is a deficient number, since it is larger than the sum of its proper divisors (2602571).

1023151554121 is an equidigital number, since it uses as much as digits as its factorization.

1023151554121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602570.

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 1023151554121 in words is "one trillion, twenty-three billion, one hundred fifty-one million, five hundred fifty-four thousand, one hundred twenty-one".