1211202021011 has 8 divisors (see below), whose sum is σ = 1228009239744. Its totient is φ = 1194400624320.

The previous prime is 1211202020957. The next prime is 1211202021061. The reversal of 1211202021011 is 1101202021121.

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 1211202021011 - 2¹⁴ = 1211202004627 is a prime.

It is a super-2 number, since 2×1211202021011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211202021061) 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, 1035716 + ... + 1869521.

It is an arithmetic number, because the mean of its divisors is an integer number (153501154968).

Almost surely, 2^{1211202021011} is an apocalyptic number.

1211202021011 is a deficient number, since it is larger than the sum of its proper divisors (16807218733).

1211202021011 is an equidigital number, since it uses as much as digits as its factorization.

1211202021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911021.

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

Adding to 1211202021011 its reverse (1101202021121), we get a palindrome (2312404042132).

The spelling of 1211202021011 in words is "one trillion, two hundred eleven billion, two hundred two million, twenty-one thousand, eleven".