121400351 has 4 divisors (see below), whose sum is σ = 125586600. Its totient is φ = 117214104.

The previous prime is 121400341. The next prime is 121400401. The reversal of 121400351 is 153004121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121400351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121400341) 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, 2093081 + ... + 2093138.

It is an arithmetic number, because the mean of its divisors is an integer number (31396650).

Almost surely, 2^121400351 is an apocalyptic number.

121400351 is a deficient number, since it is larger than the sum of its proper divisors (4186249).

121400351 is an equidigital number, since it uses as much as digits as its factorization.

121400351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186248.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121400351 is about 11018.1827448995. The cubic root of 121400351 is about 495.1536454649.

Adding to 121400351 its reverse (153004121), we get a palindrome (274404472).

The spelling of 121400351 in words is "one hundred twenty-one million, four hundred thousand, three hundred fifty-one".