1021211200121 has 8 divisors (see below), whose sum is σ = 1168489580160. Its totient is φ = 874280586528.

The previous prime is 1021211200099. The next prime is 1021211200151. The reversal of 1021211200121 is 1210021121201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021211200121 is a prime.

It is a super-2 number, since 2×1021211200121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021211200096 and 1021211200105.

It is not an unprimeable number, because it can be changed into a prime (1021211200151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86935316 + ... + 86947061.

It is an arithmetic number, because the mean of its divisors is an integer number (146061197520).

Almost surely, 2^{1021211200121} is an apocalyptic number.

It is an amenable number.

1021211200121 is a deficient number, since it is larger than the sum of its proper divisors (147278380039).

1021211200121 is an equidigital number, since it uses as much as digits as its factorization.

1021211200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173883223.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1021211200121 its reverse (1210021121201), we get a palindrome (2231232321322).

The spelling of 1021211200121 in words is "one trillion, twenty-one billion, two hundred eleven million, two hundred thousand, one hundred twenty-one".