120021012541 has 2 divisors, whose sum is σ = 120021012542. Its totient is φ = 120021012540.

The previous prime is 120021012511. The next prime is 120021012647. The reversal of 120021012541 is 145210120021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115172675641 + 4848336900 = 339371^2 + 69630^2 .

It is an emirp because it is prime and its reverse (145210120021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120021012541 - 2⁵ = 120021012509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120021012511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010506270 + 60010506271.

It is an arithmetic number, because the mean of its divisors is an integer number (60010506271).

Almost surely, 2^120021012541 is an apocalyptic number.

It is an amenable number.

120021012541 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021012541 is an equidigital number, since it uses as much as digits as its factorization.

120021012541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 120021012541 its reverse (145210120021), we get a palindrome (265231132562).

The spelling of 120021012541 in words is "one hundred twenty billion, twenty-one million, twelve thousand, five hundred forty-one".