1101202121121 has 4 divisors (see below), whose sum is σ = 1468269494832. Its totient is φ = 734134747412.

The previous prime is 1101202121101. The next prime is 1101202121141. The reversal of 1101202121121 is 1211212021011.

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 an interprime number because it is at equal distance from previous prime (1101202121101) and next prime (1101202121141).

It is a cyclic number.

It is not a de Polignac number, because 1101202121121 - 2³⁰ = 1100128379297 is a prime.

It is a super-2 number, since 2×1101202121121² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1101202121121.

It is not an unprimeable number, because it can be changed into a prime (1101202121101) 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, 183533686851 + ... + 183533686856.

It is an arithmetic number, because the mean of its divisors is an integer number (367067373708).

Almost surely, 2^{1101202121121} is an apocalyptic number.

It is an amenable number.

1101202121121 is a deficient number, since it is larger than the sum of its proper divisors (367067373711).

1101202121121 is an equidigital number, since it uses as much as digits as its factorization.

1101202121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367067373710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1101202121121 its reverse (1211212021011), we get a palindrome (2312414142132).

The spelling of 1101202121121 in words is "one trillion, one hundred one billion, two hundred two million, one hundred twenty-one thousand, one hundred twenty-one".