121220001022100 has 36 divisors (see below), whose sum is σ = 263113711977984. Its totient is φ = 48475777411680.

The previous prime is 121220001022091. The next prime is 121220001022147. The reversal of 121220001022100 is 1220100022121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152388782 + ... + 153182181.

Almost surely, 2^{121220001022100} is an apocalyptic number.

121220001022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220001022100 is an abundant number, since it is smaller than the sum of its proper divisors (141893710955884).

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

121220001022100 is a wasteful number, since it uses less digits than its factorization.

121220001022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305574944 (or 305574937 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121220001022100 its reverse (1220100022121), we get a palindrome (122440101044221).

The spelling of 121220001022100 in words is "one hundred twenty-one trillion, two hundred twenty billion, one million, twenty-two thousand, one hundred".