1211022002121 has 16 divisors (see below), whose sum is σ = 1685573569536. Its totient is φ = 771937276176.

The previous prime is 1211022002089. The next prime is 1211022002161. The reversal of 1211022002121 is 1212002201121.

It is not a de Polignac number, because 1211022002121 - 2⁵ = 1211022002089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211022002121.

It is not an unprimeable number, because it can be changed into a prime (1211022002161) 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, 3333295 + ... + 3678708.

It is an arithmetic number, because the mean of its divisors is an integer number (105348348096).

Almost surely, 2^{1211022002121} is an apocalyptic number.

It is an amenable number.

1211022002121 is a deficient number, since it is larger than the sum of its proper divisors (474551567415).

1211022002121 is a wasteful number, since it uses less digits than its factorization.

1211022002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014532.

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

Adding to 1211022002121 its reverse (1212002201121), we get a palindrome (2423024203242).

The spelling of 1211022002121 in words is "one trillion, two hundred eleven billion, twenty-two million, two thousand, one hundred twenty-one".