12021054151778 has 16 divisors (see below), whose sum is σ = 21318125590080. Its totient is φ = 4974229304016.

The previous prime is 12021054151759. The next prime is 12021054151783. The reversal of 12021054151778 is 87715145012021.

It is a super-2 number, since 2×12021054151778² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14804253476 + ... + 14804254287.

It is an arithmetic number, because the mean of its divisors is an integer number (1332382849380).

Almost surely, 2^{12021054151778} is an apocalyptic number.

12021054151778 is a deficient number, since it is larger than the sum of its proper divisors (9297071438302).

12021054151778 is a wasteful number, since it uses less digits than its factorization.

12021054151778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29608507801.

The product of its (nonzero) digits is 156800, while the sum is 44.

Adding to 12021054151778 its reverse (87715145012021), we get a palindrome (99736199163799).

The spelling of 12021054151778 in words is "twelve trillion, twenty-one billion, fifty-four million, one hundred fifty-one thousand, seven hundred seventy-eight".