121287012227 has 12 divisors (see below), whose sum is σ = 128959650456. Its totient is φ = 114047554560.

The previous prime is 121287012173. The next prime is 121287012367. The reversal of 121287012227 is 722210782121.

It is not a de Polignac number, because 121287012227 - 2⁶ = 121287012163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121287011227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122963 + ... + 507635.

It is an arithmetic number, because the mean of its divisors is an integer number (10746637538).

Almost surely, 2^121287012227 is an apocalyptic number.

121287012227 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121287012227 is a deficient number, since it is larger than the sum of its proper divisors (7672638229).

121287012227 is a wasteful number, since it uses less digits than its factorization.

121287012227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385798 (or 385781 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

Adding to 121287012227 its reverse (722210782121), we get a palindrome (843497794348).

The spelling of 121287012227 in words is "one hundred twenty-one billion, two hundred eighty-seven million, twelve thousand, two hundred twenty-seven".