1211202021121 has 8 divisors (see below), whose sum is σ = 1288098758880. Its totient is φ = 1134933012288.

The previous prime is 1211202021103. The next prime is 1211202021137.

1211202021121 is nontrivially palindromic in base 10.

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 1211202021121 - 2⁵ = 1211202021089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211202021095 and 1211202021104.

It is not an unprimeable number, because it can be changed into a prime (1211202021101) 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, 156928251 + ... + 156935968.

It is an arithmetic number, because the mean of its divisors is an integer number (161012344860).

Almost surely, 2^{1211202021121} is an apocalyptic number.

It is an amenable number.

1211202021121 is a deficient number, since it is larger than the sum of its proper divisors (76896737759).

1211202021121 is a wasteful number, since it uses less digits than its factorization.

1211202021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313864463.

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

The spelling of 1211202021121 in words is "one trillion, two hundred eleven billion, two hundred two million, twenty-one thousand, one hundred twenty-one".