121100102111001 has 32 divisors (see below), whose sum is σ = 176526965139840. Its totient is φ = 73399917671424.

The previous prime is 121100102110969. The next prime is 121100102111011. The reversal of 121100102111001 is 100111201001121.

It is not a de Polignac number, because 121100102111001 - 2⁵ = 121100102110969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121100102111011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83150656 + ... + 84594513.

It is an arithmetic number, because the mean of its divisors is an integer number (5516467660620).

Almost surely, 2^{121100102111001} is an apocalyptic number.

It is an amenable number.

121100102111001 is a deficient number, since it is larger than the sum of its proper divisors (55426863028839).

121100102111001 is a wasteful number, since it uses less digits than its factorization.

121100102111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167745465.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121100102111001 its reverse (100111201001121), we get a palindrome (221211303112122).

The spelling of 121100102111001 in words is "one hundred twenty-one trillion, one hundred billion, one hundred two million, one hundred eleven thousand, one".