1021210111001 has 8 divisors (see below), whose sum is σ = 1080963367200. Its totient is φ = 962057390400.

The previous prime is 1021210110989. The next prime is 1021210111091. The reversal of 1021210111001 is 1001110121201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021210111001 - 2¹⁴ = 1021210094617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021210111091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150130400 + ... + 150137201.

It is an arithmetic number, because the mean of its divisors is an integer number (135120420900).

Almost surely, 2^{1021210111001} is an apocalyptic number.

It is an amenable number.

1021210111001 is a deficient number, since it is larger than the sum of its proper divisors (59753256199).

1021210111001 is a wasteful number, since it uses less digits than its factorization.

1021210111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300267799.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1021210111001 its reverse (1001110121201), we get a palindrome (2022320232202).

The spelling of 1021210111001 in words is "one trillion, twenty-one billion, two hundred ten million, one hundred eleven thousand, one".