121403356 has 18 divisors (see below), whose sum is σ = 216142640. Its totient is φ = 59665992.

The previous prime is 121403351. The next prime is 121403363. The reversal of 121403356 is 653304121.

It is a self number, because there is not a number n which added to its sum of digits gives 121403356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121403351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9565 + ... + 18283.

Almost surely, 2^121403356 is an apocalyptic number.

It is an amenable number.

121403356 is a deficient number, since it is larger than the sum of its proper divisors (94739284).

121403356 is an equidigital number, since it uses as much as digits as its factorization.

121403356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8841 (or 8780 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 121403356 is about 11018.3191095557. The cubic root of 121403356 is about 495.1577309128.

Adding to 121403356 its reverse (653304121), we get a palindrome (774707477).

The spelling of 121403356 in words is "one hundred twenty-one million, four hundred three thousand, three hundred fifty-six".