121131210454 has 16 divisors (see below), whose sum is σ = 191270738880. Its totient is φ = 57374661960.

The previous prime is 121131210433. The next prime is 121131210503. The reversal of 121131210454 is 454012131121.

It is a happy number.

It is a super-2 number, since 2×121131210454² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663609 + ... + 826219.

It is an arithmetic number, because the mean of its divisors is an integer number (11954421180).

Almost surely, 2^121131210454 is an apocalyptic number.

121131210454 is a deficient number, since it is larger than the sum of its proper divisors (70139528426).

121131210454 is a wasteful number, since it uses less digits than its factorization.

121131210454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182235.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 121131210454 its reverse (454012131121), we get a palindrome (575143341575).

The spelling of 121131210454 in words is "one hundred twenty-one billion, one hundred thirty-one million, two hundred ten thousand, four hundred fifty-four".