121201011001220 has 24 divisors (see below), whose sum is σ = 254680506569664. Its totient is φ = 48450236121056.

The previous prime is 121201011001211. The next prime is 121201011001223. The reversal of 121201011001220 is 22100110102121.

It is a junction number, because it is equal to n+sod(n) for n = 121201011001195 and 121201011001204.

It is not an unprimeable number, because it can be changed into a prime (121201011001223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1885484522 + ... + 1885548801.

It is an arithmetic number, because the mean of its divisors is an integer number (10611687773736).

Almost surely, 2^{121201011001220} is an apocalyptic number.

121201011001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201011001220 is an abundant number, since it is smaller than the sum of its proper divisors (133479495568444).

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

121201011001220 is a wasteful number, since it uses less digits than its factorization.

121201011001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771034939 (or 3771034937 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121201011001220 its reverse (22100110102121), we get a palindrome (143301121103341).

The spelling of 121201011001220 in words is "one hundred twenty-one trillion, two hundred one billion, eleven million, one thousand, two hundred twenty".