20121102129986 has 32 divisors (see below), whose sum is σ = 35469176049216. Its totient is φ = 8439799032000.

The previous prime is 20121102129983. The next prime is 20121102129991. The reversal of 20121102129986 is 68992120112102.

It is not an unprimeable number, because it can be changed into a prime (20121102129983) 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, 9999860 + ... + 11842271.

It is an arithmetic number, because the mean of its divisors is an integer number (1108411751538).

Almost surely, 2^{20121102129986} is an apocalyptic number.

20121102129986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20121102129986 is a deficient number, since it is larger than the sum of its proper divisors (15348073919230).

20121102129986 is a wasteful number, since it uses less digits than its factorization.

20121102129986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21845378.

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 20121102129986 in words is "twenty trillion, one hundred twenty-one billion, one hundred two million, one hundred twenty-nine thousand, nine hundred eighty-six".