121551251294 has 32 divisors (see below), whose sum is σ = 199259246592. Its totient is φ = 55151460000.

The previous prime is 121551251293. The next prime is 121551251389. The reversal of 121551251294 is 492152155121.

It is a happy number.

It is a super-2 number, since 2×121551251294² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121551251293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42101519 + ... + 42104405.

It is an arithmetic number, because the mean of its divisors is an integer number (6226851456).

Almost surely, 2^121551251294 is an apocalyptic number.

121551251294 is a deficient number, since it is larger than the sum of its proper divisors (77707995298).

121551251294 is a wasteful number, since it uses less digits than its factorization.

121551251294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672.

The product of its digits is 36000, while the sum is 38.

The spelling of 121551251294 in words is "one hundred twenty-one billion, five hundred fifty-one million, two hundred fifty-one thousand, two hundred ninety-four".