121020012212121 has 40 divisors (see below), whose sum is σ = 198319573346400. Its totient is φ = 72935710666560.

The previous prime is 121020012212081. The next prime is 121020012212137. The reversal of 121020012212121 is 121212210020121.

121020012212121 is a `hidden beast` number, since 1 + 210 + 20 + 0 + 1 + 221 + 212 + 1 = 666.

It is not a de Polignac number, because 121020012212121 - 2²² = 121020008017817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121020012212094 and 121020012212103.

It is not an unprimeable number, because it can be changed into a prime (121020012212161) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 379239756 + ... + 379558733.

It is an arithmetic number, because the mean of its divisors is an integer number (4957989333660).

Almost surely, 2^{121020012212121} is an apocalyptic number.

121020012212121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121020012212121 is a deficient number, since it is larger than the sum of its proper divisors (77299561134279).

121020012212121 is a wasteful number, since it uses less digits than its factorization.

121020012212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758798691 (or 758798682 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121020012212121 its reverse (121212210020121), we get a palindrome (242232222232242).

The spelling of 121020012212121 in words is "one hundred twenty-one trillion, twenty billion, twelve million, two hundred twelve thousand, one hundred twenty-one".