121012011211 has 16 divisors (see below), whose sum is σ = 149281875904. Its totient is φ = 95524614144.

The previous prime is 121012011187. The next prime is 121012011227. The reversal of 121012011211 is 112110210121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121012011211 - 2¹⁹ = 121011486923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 121012011191 and 121012011200.

It is not an unprimeable number, because it can be changed into a prime (121012011271) 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, 1496166 + ... + 1574971.

It is an arithmetic number, because the mean of its divisors is an integer number (9330117244).

Almost surely, 2^121012011211 is an apocalyptic number.

121012011211 is a deficient number, since it is larger than the sum of its proper divisors (28269864693).

121012011211 is a wasteful number, since it uses less digits than its factorization.

121012011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071590.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121012011211 its reverse (112110210121), we get a palindrome (233122221332).

The spelling of 121012011211 in words is "one hundred twenty-one billion, twelve million, eleven thousand, two hundred eleven".