10020001221000 has 192 divisors, whose sum is σ = 35340109384320. Its totient is φ = 2555826345600.

The previous prime is 10020001220989. The next prime is 10020001221019. The reversal of 10020001221000 is 12210002001.

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

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, 23995902 + ... + 24409901.

It is an arithmetic number, because the mean of its divisors is an integer number (184063069710).

Almost surely, 2^{10020001221000} is an apocalyptic number.

10020001221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10020001221000 is an abundant number, since it is smaller than the sum of its proper divisors (25320108163320).

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

10020001221000 is a wasteful number, since it uses less digits than its factorization.

10020001221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48405853 (or 48405836 counting only the distinct ones).

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

Adding to 10020001221000 its reverse (12210002001), we get a palindrome (10032211223001).

The spelling of 10020001221000 in words is "ten trillion, twenty billion, one million, two hundred twenty-one thousand".