20121667220151 has 36 divisors (see below), whose sum is σ = 33825758428800. Its totient is φ = 11492694315648.

The previous prime is 20121667220147. The next prime is 20121667220177. The reversal of 20121667220151 is 15102276612102.

20121667220151 is a `hidden beast` number, since 201 + 21 + 6 + 67 + 220 + 151 = 666.

It is not a de Polignac number, because 20121667220151 - 2² = 20121667220147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121667220141) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9776791 + ... + 11654568.

It is an arithmetic number, because the mean of its divisors is an integer number (939604400800).

Almost surely, 2^{20121667220151} is an apocalyptic number.

20121667220151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20121667220151 is a deficient number, since it is larger than the sum of its proper divisors (13704091208649).

20121667220151 is a wasteful number, since it uses less digits than its factorization.

20121667220151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21433508 (or 21433498 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 20121667220151 in words is "twenty trillion, one hundred twenty-one billion, six hundred sixty-seven million, two hundred twenty thousand, one hundred fifty-one".