121400305207 has 2 divisors, whose sum is σ = 121400305208. Its totient is φ = 121400305206.

The previous prime is 121400305177. The next prime is 121400305223. The reversal of 121400305207 is 702503004121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121400305207 - 2²⁷ = 121266087479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121400305237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60700152603 + 60700152604.

It is an arithmetic number, because the mean of its divisors is an integer number (60700152604).

Almost surely, 2^121400305207 is an apocalyptic number.

121400305207 is a deficient number, since it is larger than the sum of its proper divisors (1).

121400305207 is an equidigital number, since it uses as much as digits as its factorization.

121400305207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 121400305207 its reverse (702503004121), we get a palindrome (823903309328).

The spelling of 121400305207 in words is "one hundred twenty-one billion, four hundred million, three hundred five thousand, two hundred seven".