1211020201121 has 16 divisors (see below), whose sum is σ = 1263637075968. Its totient is φ = 1159837224000.

The previous prime is 1211020201063. The next prime is 1211020201147.

1211020201121 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1211020201121 - 2⁶ = 1211020201057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211020201096 and 1211020201105.

It is not an unprimeable number, because it can be changed into a prime (1211020501121) 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, 1213121 + ... + 1973246.

It is an arithmetic number, because the mean of its divisors is an integer number (78977317248).

Almost surely, 2^{1211020201121} is an apocalyptic number.

It is an amenable number.

1211020201121 is a deficient number, since it is larger than the sum of its proper divisors (52616874847).

1211020201121 is a wasteful number, since it uses less digits than its factorization.

1211020201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186592.

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

It can be divided in two parts, 1211020 and 201121, that added together give a palindrome (1412141).

The spelling of 1211020201121 in words is "one trillion, two hundred eleven billion, twenty million, two hundred one thousand, one hundred twenty-one".