121200211011 has 16 divisors (see below), whose sum is σ = 176302965888. Its totient is φ = 73449777600.

The previous prime is 121200211003. The next prime is 121200211049. The reversal of 121200211011 is 110112002121.

It is not a de Polignac number, because 121200211011 - 2³ = 121200211003 is a prime.

It is a super-2 number, since 2×121200211011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121200211211) 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, 415516 + ... + 644246.

It is an arithmetic number, because the mean of its divisors is an integer number (11018935368).

Almost surely, 2^121200211011 is an apocalyptic number.

121200211011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121200211011 is a deficient number, since it is larger than the sum of its proper divisors (55102754877).

121200211011 is a wasteful number, since it uses less digits than its factorization.

121200211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244802.

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

Adding to 121200211011 its reverse (110112002121), we get a palindrome (231312213132).

It can be divided in two parts, 1212002110 and 11, that added together give a palindrome (1212002121).

The spelling of 121200211011 in words is "one hundred twenty-one billion, two hundred million, two hundred eleven thousand, eleven".