121020102021111 has 8 divisors (see below), whose sum is σ = 161459679610224. Its totient is φ = 80630296223040.

The previous prime is 121020102021061. The next prime is 121020102021167. The reversal of 121020102021111 is 111120201020121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121020102021111 - 2¹⁰ = 121020102020087 is a prime.

It is a super-2 number, since 2×121020102021111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020102021811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12442942086 + ... + 12442951811.

It is an arithmetic number, because the mean of its divisors is an integer number (20182459951278).

Almost surely, 2^{121020102021111} is an apocalyptic number.

121020102021111 is a deficient number, since it is larger than the sum of its proper divisors (40439577589113).

121020102021111 is a wasteful number, since it uses less digits than its factorization.

121020102021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24885895521.

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

Adding to 121020102021111 its reverse (111120201020121), we get a palindrome (232140303041232).

The spelling of 121020102021111 in words is "one hundred twenty-one trillion, twenty billion, one hundred two million, twenty-one thousand, one hundred eleven".