121020212220212 has 6 divisors (see below), whose sum is σ = 211785371385378. Its totient is φ = 60510106110104.

The previous prime is 121020212220209. The next prime is 121020212220217. The reversal of 121020212220212 is 212022212020121.

It can be written as a sum of positive squares in only one way, i.e., 81617022597796 + 39403189622416 = 9034214^2 + 6277196^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020212220217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15127526527523 + ... + 15127526527530.

It is an arithmetic number, because the mean of its divisors is an integer number (35297561897563).

Almost surely, 2^{121020212220212} is an apocalyptic number.

It is an amenable number.

121020212220212 is a deficient number, since it is larger than the sum of its proper divisors (90765159165166).

121020212220212 is a wasteful number, since it uses less digits than its factorization.

121020212220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30255053055057 (or 30255053055055 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121020212220212 its reverse (212022212020121), we get a palindrome (333042424240333).

The spelling of 121020212220212 in words is "one hundred twenty-one trillion, twenty billion, two hundred twelve million, two hundred twenty thousand, two hundred twelve".