121012021011 has 16 divisors (see below), whose sum is σ = 190347634688. Its totient is φ = 66919089600.

The previous prime is 121012021007. The next prime is 121012021027. The reversal of 121012021011 is 110120210121.

It is not a de Polignac number, because 121012021011 - 2² = 121012021007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121012021051) 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, 92942530 + ... + 92943831.

It is an arithmetic number, because the mean of its divisors is an integer number (11896727168).

Almost surely, 2^121012021011 is an apocalyptic number.

121012021011 is a deficient number, since it is larger than the sum of its proper divisors (69335613677).

121012021011 is a wasteful number, since it uses less digits than its factorization.

121012021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185886402.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121012021011 its reverse (110120210121), we get a palindrome (231132231132).

It can be divided in two parts, 1 and 21012021011, that added together give a palindrome (21012021012).

The spelling of 121012021011 in words is "one hundred twenty-one billion, twelve million, twenty-one thousand, eleven".