121347531091 has 2 divisors, whose sum is σ = 121347531092. Its totient is φ = 121347531090.

The previous prime is 121347531083. The next prime is 121347531133. The reversal of 121347531091 is 190135743121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121347531091 - 2³ = 121347531083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121347531091.

It is not a weakly prime, because it can be changed into another prime (121347531391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60673765545 + 60673765546.

It is an arithmetic number, because the mean of its divisors is an integer number (60673765546).

Almost surely, 2^121347531091 is an apocalyptic number.

121347531091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121347531091 is an equidigital number, since it uses as much as digits as its factorization.

121347531091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 121347531091 in words is "one hundred twenty-one billion, three hundred forty-seven million, five hundred thirty-one thousand, ninety-one".