121641023427 has 64 divisors (see below), whose sum is σ = 212106608640. Its totient is φ = 60125788800.

The previous prime is 121641023401. The next prime is 121641023431. The reversal of 121641023427 is 724320146121.

It is a de Polignac number, because none of the positive numbers 2^k-121641023427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (121641023467) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 954849 + ... + 1074717.

It is an arithmetic number, because the mean of its divisors is an integer number (3314165760).

Almost surely, 2^121641023427 is an apocalyptic number.

121641023427 is a deficient number, since it is larger than the sum of its proper divisors (90465585213).

121641023427 is a wasteful number, since it uses less digits than its factorization.

121641023427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120104.

The product of its (nonzero) digits is 16128, while the sum is 33.

Adding to 121641023427 its reverse (724320146121), we get a palindrome (845961169548).

The spelling of 121641023427 in words is "one hundred twenty-one billion, six hundred forty-one million, twenty-three thousand, four hundred twenty-seven".