121002121012111 has 4 divisors (see below), whose sum is σ = 121047153437952. Its totient is φ = 120957088586272.

The previous prime is 121002121012109. The next prime is 121002121012121. The reversal of 121002121012111 is 111210121200121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121002121012111 - 2¹ = 121002121012109 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 (121002121012121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22516208890 + ... + 22516214263.

It is an arithmetic number, because the mean of its divisors is an integer number (30261788359488).

Almost surely, 2^{121002121012111} is an apocalyptic number.

121002121012111 is a deficient number, since it is larger than the sum of its proper divisors (45032425841).

121002121012111 is an equidigital number, since it uses as much as digits as its factorization.

121002121012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45032425840.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 121002121012111 its reverse (111210121200121), we get a palindrome (232212242212232).

The spelling of 121002121012111 in words is "one hundred twenty-one trillion, two billion, one hundred twenty-one million, twelve thousand, one hundred eleven".