11021012121 has 16 divisors (see below), whose sum is σ = 16926162944. Its totient is φ = 6248131344.

The previous prime is 11021012113. The next prime is 11021012131. The reversal of 11021012121 is 12121012011.

It is not a de Polignac number, because 11021012121 - 2³ = 11021012113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021012097 and 11021012106.

It is not an unprimeable number, because it can be changed into a prime (11021012131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2063515 + ... + 2068848.

It is an arithmetic number, because the mean of its divisors is an integer number (1057885184).

Almost surely, 2^11021012121 is an apocalyptic number.

It is an amenable number.

11021012121 is a deficient number, since it is larger than the sum of its proper divisors (5905150823).

11021012121 is a wasteful number, since it uses less digits than its factorization.

11021012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132500.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11021012121 its reverse (12121012011), we get a palindrome (23142024132).

The spelling of 11021012121 in words is "eleven billion, twenty-one million, twelve thousand, one hundred twenty-one".