11001011202121 has 4 divisors (see below), whose sum is σ = 11004935932432. Its totient is φ = 10997086471812.

The previous prime is 11001011202109. The next prime is 11001011202211. The reversal of 11001011202121 is 12120211010011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11001011202121 - 2⁷ = 11001011201993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001011202821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1962360951 + ... + 1962366556.

It is an arithmetic number, because the mean of its divisors is an integer number (2751233983108).

Almost surely, 2^{11001011202121} is an apocalyptic number.

It is an amenable number.

11001011202121 is a deficient number, since it is larger than the sum of its proper divisors (3924730311).

11001011202121 is an equidigital number, since it uses as much as digits as its factorization.

11001011202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924730310.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11001011202121 its reverse (12120211010011), we get a palindrome (23121222212132).

The spelling of 11001011202121 in words is "eleven trillion, one billion, eleven million, two hundred two thousand, one hundred twenty-one".