11012121212121 has 6 divisors (see below), whose sum is σ = 15906397306410. Its totient is φ = 7341414141408.

The previous prime is 11012121212117. The next prime is 11012121212159. The reversal of 11012121212121 is 12121212121011.

It is a happy number.

11012121212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8354764792521 + 2657356419600 = 2890461^2 + 1630140^2 .

It is not a de Polignac number, because 11012121212121 - 2² = 11012121212117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11012121212094 and 11012121212103.

It is not an unprimeable number, because it can be changed into a prime (11012121282121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611784511776 + ... + 611784511793.

It is an arithmetic number, because the mean of its divisors is an integer number (2651066217735).

Almost surely, 2^{11012121212121} is an apocalyptic number.

It is an amenable number.

11012121212121 is a deficient number, since it is larger than the sum of its proper divisors (4894276094289).

11012121212121 is a wasteful number, since it uses less digits than its factorization.

11012121212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223569023575 (or 1223569023572 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11012121212121 its reverse (12121212121011), we get a palindrome (23133333333132).

The spelling of 11012121212121 in words is "eleven trillion, twelve billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".