121135341651 has 16 divisors (see below), whose sum is σ = 162565986720. Its totient is φ = 80231477760.

The previous prime is 121135341647. The next prime is 121135341671. The reversal of 121135341651 is 156143531121.

It is a happy number.

It is not a de Polignac number, because 121135341651 - 2² = 121135341647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121135341671) 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, 632235 + ... + 801243.

It is an arithmetic number, because the mean of its divisors is an integer number (10160374170).

Almost surely, 2^121135341651 is an apocalyptic number.

121135341651 is a deficient number, since it is larger than the sum of its proper divisors (41430645069).

121135341651 is a wasteful number, since it uses less digits than its factorization.

121135341651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170566.

The product of its digits is 10800, while the sum is 33.

Adding to 121135341651 its reverse (156143531121), we get a palindrome (277278872772).

The spelling of 121135341651 in words is "one hundred twenty-one billion, one hundred thirty-five million, three hundred forty-one thousand, six hundred fifty-one".