1211211201011 has 6 divisors (see below), whose sum is σ = 1408959968580. Its totient is φ = 1038181029396.

The previous prime is 1211211200989. The next prime is 1211211201023. The reversal of 1211211201011 is 1101021121121.

It is not a de Polignac number, because 1211211201011 - 2²² = 1211207006707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211211203011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12359297921 + ... + 12359298018.

It is an arithmetic number, because the mean of its divisors is an integer number (234826661430).

Almost surely, 2^{1211211201011} is an apocalyptic number.

1211211201011 is a deficient number, since it is larger than the sum of its proper divisors (197748767569).

1211211201011 is an equidigital number, since it uses as much as digits as its factorization.

1211211201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24718595953 (or 24718595946 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1211211201011 its reverse (1101021121121), we get a palindrome (2312232322132).

The spelling of 1211211201011 in words is "one trillion, two hundred eleven billion, two hundred eleven million, two hundred one thousand, eleven".