121030020111 has 32 divisors (see below), whose sum is σ = 216669132288. Its totient is φ = 58036371840.

The previous prime is 121030020061. The next prime is 121030020127. The reversal of 121030020111 is 111020030121.

It is not a de Polignac number, because 121030020111 - 2¹¹ = 121030018063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121030020611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20148516 + ... + 20154521.

It is an arithmetic number, because the mean of its divisors is an integer number (6770910384).

Almost surely, 2^121030020111 is an apocalyptic number.

121030020111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121030020111 is a deficient number, since it is larger than the sum of its proper divisors (95639112177).

121030020111 is a wasteful number, since it uses less digits than its factorization.

121030020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40303071.

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

Adding to 121030020111 its reverse (111020030121), we get a palindrome (232050050232).

The spelling of 121030020111 in words is "one hundred twenty-one billion, thirty million, twenty thousand, one hundred eleven".