1154151201421 has 2 divisors, whose sum is σ = 1154151201422. Its totient is φ = 1154151201420.

The previous prime is 1154151201337. The next prime is 1154151201443. The reversal of 1154151201421 is 1241021514511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 716707855396 + 437443346025 = 846586^2 + 661395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1154151201421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1154151201421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1154151201451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577075600710 + 577075600711.

It is an arithmetic number, because the mean of its divisors is an integer number (577075600711).

Almost surely, 2^{1154151201421} is an apocalyptic number.

It is an amenable number.

1154151201421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154151201421 is an equidigital number, since it uses as much as digits as its factorization.

1154151201421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 28.

Adding to 1154151201421 its reverse (1241021514511), we get a palindrome (2395172715932).

The spelling of 1154151201421 in words is "one trillion, one hundred fifty-four billion, one hundred fifty-one million, two hundred one thousand, four hundred twenty-one".