121100020111 has 16 divisors (see below), whose sum is σ = 145705881600. Its totient is φ = 98322247008.

The previous prime is 121100020103. The next prime is 121100020231. The reversal of 121100020111 is 111020001121.

It is a cyclic number.

It is not a de Polignac number, because 121100020111 - 2³ = 121100020103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100000111) 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, 880605 + ... + 1008793.

It is an arithmetic number, because the mean of its divisors is an integer number (9106617600).

Almost surely, 2^121100020111 is an apocalyptic number.

121100020111 is a deficient number, since it is larger than the sum of its proper divisors (24605861489).

121100020111 is a wasteful number, since it uses less digits than its factorization.

121100020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135318.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121100020111 its reverse (111020001121), we get a palindrome (232120021232).

The spelling of 121100020111 in words is "one hundred twenty-one billion, one hundred million, twenty thousand, one hundred eleven".