211210121012122 has 4 divisors (see below), whose sum is σ = 316815181518186. Its totient is φ = 105605060506060.

The previous prime is 211210121012117. The next prime is 211210121012227. The reversal of 211210121012122 is 221210121012112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 123145428662281 + 88064692349841 = 11097091^2 + 9384279^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211210121012122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52802530253029 + ... + 52802530253032.

Almost surely, 2^{211210121012122} is an apocalyptic number.

211210121012122 is a deficient number, since it is larger than the sum of its proper divisors (105605060506064).

211210121012122 is a wasteful number, since it uses less digits than its factorization.

211210121012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105605060506063.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211210121012122 its reverse (221210121012112), we get a palindrome (432420242024234).

The spelling of 211210121012122 in words is "two hundred eleven trillion, two hundred ten billion, one hundred twenty-one million, twelve thousand, one hundred twenty-two".