121400432 has 20 divisors (see below), whose sum is σ = 236796600. Its totient is φ = 60291648.

The previous prime is 121400429. The next prime is 121400437. The reversal of 121400432 is 234004121.

It is a super-3 number, since 3×121400432³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121400432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121400437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23078 + ... + 27845.

It is an arithmetic number, because the mean of its divisors is an integer number (11839830).

Almost surely, 2^121400432 is an apocalyptic number.

It is an amenable number.

121400432 is a deficient number, since it is larger than the sum of its proper divisors (115396168).

121400432 is a wasteful number, since it uses less digits than its factorization.

121400432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51080 (or 51074 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 121400432 is about 11018.1864206411. The cubic root of 121400432 is about 495.1537555893.

Adding to 121400432 its reverse (234004121), we get a palindrome (355404553).

The spelling of 121400432 in words is "one hundred twenty-one million, four hundred thousand, four hundred thirty-two".