25121011019977 has 2 divisors, whose sum is σ = 25121011019978. Its totient is φ = 25121011019976.

The previous prime is 25121011019941. The next prime is 25121011020059. The reversal of 25121011019977 is 77991011012152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25071941681721 + 49069338256 = 5007189^2 + 221516^2 .

It is a cyclic number.

It is not a de Polignac number, because 25121011019977 - 2¹⁹ = 25121010495689 is a prime.

It is not a weakly prime, because it can be changed into another prime (25121011016977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560505509988 + 12560505509989.

It is an arithmetic number, because the mean of its divisors is an integer number (12560505509989).

Almost surely, 2^{25121011019977} is an apocalyptic number.

It is an amenable number.

25121011019977 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121011019977 is an equidigital number, since it uses as much as digits as its factorization.

25121011019977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 46.

The spelling of 25121011019977 in words is "twenty-five trillion, one hundred twenty-one billion, eleven million, nineteen thousand, nine hundred seventy-seven".