1021212121201 has 24 divisors (see below), whose sum is σ = 1089032624064. Its totient is φ = 957381530400.

The previous prime is 1021212121157. The next prime is 1021212121229.

1021212121201 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1021212121201 - 2¹¹ = 1021212119153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021212121271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81775780 + ... + 81788266.

It is an arithmetic number, because the mean of its divisors is an integer number (45376359336).

Almost surely, 2^{1021212121201} is an apocalyptic number.

It is an amenable number.

1021212121201 is a deficient number, since it is larger than the sum of its proper divisors (67820502863).

1021212121201 is a wasteful number, since it uses less digits than its factorization.

1021212121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14869 (or 14850 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

The spelling of 1021212121201 in words is "one trillion, twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred one".