1021210022121 has 8 divisors (see below), whose sum is σ = 1361626049280. Its totient is φ = 680800338192.

The previous prime is 1021210022071. The next prime is 1021210022167. The reversal of 1021210022121 is 1212200121201.

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

It is not a de Polignac number, because 1021210022121 - 2²¹ = 1021207924969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021210022121.

It is not an unprimeable number, because it can be changed into a prime (1021210032121) 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, 1196505 + ... + 1863878.

It is an arithmetic number, because the mean of its divisors is an integer number (170203256160).

Almost surely, 2^{1021210022121} is an apocalyptic number.

It is an amenable number.

1021210022121 is a deficient number, since it is larger than the sum of its proper divisors (340416027159).

1021210022121 is a wasteful number, since it uses less digits than its factorization.

1021210022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171615.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1021210022121 its reverse (1212200121201), we get a palindrome (2233410143322).

The spelling of 1021210022121 in words is "one trillion, twenty-one billion, two hundred ten million, twenty-two thousand, one hundred twenty-one".