121000020010100 has 144 divisors (see below), whose sum is σ = 330601244916096. Its totient is φ = 37340882880000.

The previous prime is 121000020010087. The next prime is 121000020010123. The reversal of 121000020010100 is 1010020000121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77015807 + ... + 78571206.

It is an arithmetic number, because the mean of its divisors is an integer number (2295841978584).

Almost surely, 2^{121000020010100} is an apocalyptic number.

121000020010100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000020010100 is an abundant number, since it is smaller than the sum of its proper divisors (209601224905996).

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

121000020010100 is a wasteful number, since it uses less digits than its factorization.

121000020010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155587146 (or 155587139 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 121000020010100 its reverse (1010020000121), we get a palindrome (122010040010221).

The spelling of 121000020010100 in words is "one hundred twenty-one trillion, twenty million, ten thousand, one hundred".