121111201011 has 16 divisors (see below), whose sum is σ = 166002147584. Its totient is φ = 78484637664.

The previous prime is 121111200967. The next prime is 121111201021. The reversal of 121111201011 is 110102111121.

It is not a de Polignac number, because 121111201011 - 2¹¹ = 121111198963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121111201021) 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, 395221 + ... + 631206.

It is an arithmetic number, because the mean of its divisors is an integer number (10375134224).

Almost surely, 2^121111201011 is an apocalyptic number.

121111201011 is a deficient number, since it is larger than the sum of its proper divisors (44890946573).

121111201011 is a wasteful number, since it uses less digits than its factorization.

121111201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027530.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121111201011 its reverse (110102111121), we get a palindrome (231213312132).

The spelling of 121111201011 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred one thousand, eleven".