121020011001001 has 16 divisors (see below), whose sum is σ = 139557401625600. Its totient is φ = 102798978282000.

The previous prime is 121020011000981. The next prime is 121020011001013. The reversal of 121020011001001 is 100100110020121.

It is not a de Polignac number, because 121020011001001 - 2⁹ = 121020011000489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121020011001041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172712611 + ... + 173411896.

It is an arithmetic number, because the mean of its divisors is an integer number (8722337601600).

Almost surely, 2^{121020011001001} is an apocalyptic number.

It is an amenable number.

121020011001001 is a deficient number, since it is larger than the sum of its proper divisors (18537390624599).

121020011001001 is a wasteful number, since it uses less digits than its factorization.

121020011001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346124964.

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

Adding to 121020011001001 its reverse (100100110020121), we get a palindrome (221120121021122).

The spelling of 121020011001001 in words is "one hundred twenty-one trillion, twenty billion, eleven million, one thousand, one".