121821827292 has 36 divisors (see below), whose sum is σ = 335932918776. Its totient is φ = 36915705120.

The previous prime is 121821827291. The next prime is 121821827327. The reversal of 121821827292 is 292728128121.

121821827292 is a `hidden beast` number, since 1 + 2 + 182 + 182 + 7 + 292 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121821827291) 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, 153815043 + ... + 153815834.

It is an arithmetic number, because the mean of its divisors is an integer number (9331469966).

Almost surely, 2^121821827292 is an apocalyptic number.

121821827292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121821827292 is an abundant number, since it is smaller than the sum of its proper divisors (214111091484).

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

121821827292 is a wasteful number, since it uses less digits than its factorization.

121821827292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307630898 (or 307630893 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The spelling of 121821827292 in words is "one hundred twenty-one billion, eight hundred twenty-one million, eight hundred twenty-seven thousand, two hundred ninety-two".