121220011000 has 64 divisors (see below), whose sum is σ = 309441656160. Its totient is φ = 44080000000.

The previous prime is 121220010997. The next prime is 121220011013. The reversal of 121220011000 is 110022121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5499001 + ... + 5521000.

Almost surely, 2^121220011000 is an apocalyptic number.

121220011000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220011000 is an abundant number, since it is smaller than the sum of its proper divisors (188221645160).

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

121220011000 is a wasteful number, since it uses less digits than its factorization.

121220011000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020033 (or 11020019 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121220011000 its reverse (110022121), we get a palindrome (121330033121).

The spelling of 121220011000 in words is "one hundred twenty-one billion, two hundred twenty million, eleven thousand".