121887771006 has 16 divisors (see below), whose sum is σ = 243787411584. Its totient is φ = 40627278744.

The previous prime is 121887770947. The next prime is 121887771007. The reversal of 121887771006 is 600177788121.

It is a super-2 number, since 2×121887771006² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121887771007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358176 + ... + 609971.

It is an arithmetic number, because the mean of its divisors is an integer number (15236713224).

Almost surely, 2^121887771006 is an apocalyptic number.

121887771006 is an abundant number, since it is smaller than the sum of its proper divisors (121899640578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121887771006 is a wasteful number, since it uses less digits than its factorization.

121887771006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989135.

The product of its (nonzero) digits is 263424, while the sum is 48.

The spelling of 121887771006 in words is "one hundred twenty-one billion, eight hundred eighty-seven million, seven hundred seventy-one thousand, six".