121001021011 has 16 divisors (see below), whose sum is σ = 137320706880. Its totient is φ = 105779203200.

The previous prime is 121001021003. The next prime is 121001021051. The reversal of 121001021011 is 110120100121.

It is a cyclic number.

It is not a de Polignac number, because 121001021011 - 2³ = 121001021003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001021051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1973196 + ... + 2033593.

It is an arithmetic number, because the mean of its divisors is an integer number (8582544180).

Almost surely, 2^121001021011 is an apocalyptic number.

121001021011 is a deficient number, since it is larger than the sum of its proper divisors (16319685869).

121001021011 is a wasteful number, since it uses less digits than its factorization.

121001021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006926.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121001021011 its reverse (110120100121), we get a palindrome (231121121132).

The spelling of 121001021011 in words is "one hundred twenty-one billion, one million, twenty-one thousand, eleven".