250121250091 has 2 divisors, whose sum is σ = 250121250092. Its totient is φ = 250121250090.

The previous prime is 250121250083. The next prime is 250121250109. The reversal of 250121250091 is 190052121052.

Together with next prime (250121250109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 250121250091 - 2³ = 250121250083 is a prime.

It is not a weakly prime, because it can be changed into another prime (250121253091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125060625045 + 125060625046.

It is an arithmetic number, because the mean of its divisors is an integer number (125060625046).

Almost surely, 2^250121250091 is an apocalyptic number.

250121250091 is a deficient number, since it is larger than the sum of its proper divisors (1).

250121250091 is an equidigital number, since it uses as much as digits as its factorization.

250121250091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 250121250091 in words is "two hundred fifty billion, one hundred twenty-one million, two hundred fifty thousand, ninety-one".