1000022121000 has 192 divisors, whose sum is σ = 3862942836480. Its totient is φ = 228576470400.

The previous prime is 1000022120963. The next prime is 1000022121029. The reversal of 1000022121000 is 1212200001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7873684 + ... + 7999683.

It is an arithmetic number, because the mean of its divisors is an integer number (20119493940).

Almost surely, 2^{1000022121000} is an apocalyptic number.

1000022121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000022121000 is an abundant number, since it is smaller than the sum of its proper divisors (2862920715480).

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

1000022121000 is a wasteful number, since it uses less digits than its factorization.

1000022121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15873401 (or 15873384 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1000022121000 its reverse (1212200001), we get a palindrome (1001234321001).

The spelling of 1000022121000 in words is "one trillion, twenty-two million, one hundred twenty-one thousand".