121400205303 has 16 divisors (see below), whose sum is σ = 176706168800. Its totient is φ = 73684422144.

The previous prime is 121400205287. The next prime is 121400205319. The reversal of 121400205303 is 303502004121.

It is an interprime number because it is at equal distance from previous prime (121400205287) and next prime (121400205319).

It is not a de Polignac number, because 121400205303 - 2⁴ = 121400205287 is a prime.

It is a super-2 number, since 2×121400205303² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121400205303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121400205403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21317878 + ... + 21323571.

It is an arithmetic number, because the mean of its divisors is an integer number (11044135550).

Almost surely, 2^121400205303 is an apocalyptic number.

121400205303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121400205303 is a deficient number, since it is larger than the sum of its proper divisors (55305963497).

121400205303 is a wasteful number, since it uses less digits than its factorization.

121400205303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42641538.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 121400205303 its reverse (303502004121), we get a palindrome (424902209424).

The spelling of 121400205303 in words is "one hundred twenty-one billion, four hundred million, two hundred five thousand, three hundred three".