121400305216 has 28 divisors (see below), whose sum is σ = 246506148592. Its totient is φ = 59288519808.

The previous prime is 121400305207. The next prime is 121400305223. The reversal of 121400305216 is 612503004121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22053990 + ... + 22059493.

Almost surely, 2^121400305216 is an apocalyptic number.

121400305216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121400305216 is an abundant number, since it is smaller than the sum of its proper divisors (125105843376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121400305216 is an equidigital number, since it uses as much as digits as its factorization.

121400305216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44113538 (or 44113528 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 121400305216 its reverse (612503004121), we get a palindrome (733903309337).

The spelling of 121400305216 in words is "one hundred twenty-one billion, four hundred million, three hundred five thousand, two hundred sixteen".