121102001021001 has 128 divisors (see below), whose sum is σ = 217851482161152. Its totient is φ = 57789347616000.

The previous prime is 121102001020993. The next prime is 121102001021003. The reversal of 121102001021001 is 100120100201121.

It is not a de Polignac number, because 121102001021001 - 2³ = 121102001020993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121102001021003) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 543602806 + ... + 543825536.

It is an arithmetic number, because the mean of its divisors is an integer number (1701964704384).

Almost surely, 2^{121102001021001} is an apocalyptic number.

121102001021001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121102001021001 is a deficient number, since it is larger than the sum of its proper divisors (96749481140151).

121102001021001 is a wasteful number, since it uses less digits than its factorization.

121102001021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223643.

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

Adding to 121102001021001 its reverse (100120100201121), we get a palindrome (221222101222122).

The spelling of 121102001021001 in words is "one hundred twenty-one trillion, one hundred two billion, one million, twenty-one thousand, one".