1021121020001 has 16 divisors (see below), whose sum is σ = 1187573788800. Its totient is φ = 870887432448.

The previous prime is 1021121019979. The next prime is 1021121020027. The reversal of 1021121020001 is 1000201211201.

It is not a de Polignac number, because 1021121020001 - 2²² = 1021116825697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021121022001) 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, 68717906 + ... + 68732763.

It is an arithmetic number, because the mean of its divisors is an integer number (74223361800).

Almost surely, 2^{1021121020001} is an apocalyptic number.

It is an amenable number.

1021121020001 is a deficient number, since it is larger than the sum of its proper divisors (166452768799).

1021121020001 is a wasteful number, since it uses less digits than its factorization.

1021121020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137450728.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021121020001 its reverse (1000201211201), we get a palindrome (2021322231202).

The spelling of 1021121020001 in words is "one trillion, twenty-one billion, one hundred twenty-one million, twenty thousand, one".