210001021001000 has 64 divisors (see below), whose sum is σ = 499731243336000. Its totient is φ = 82576672641600.

The previous prime is 210001021000973. The next prime is 210001021001081. The reversal of 210001021001000 is 100120100012.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1779610670 + ... + 1779728669.

It is an arithmetic number, because the mean of its divisors is an integer number (7808300677125).

Almost surely, 2^{210001021001000} is an apocalyptic number.

210001021001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210001021001000 is an abundant number, since it is smaller than the sum of its proper divisors (289730222335000).

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

210001021001000 is a wasteful number, since it uses less digits than its factorization.

210001021001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559339419 (or 3559339405 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 210001021001000 its reverse (100120100012), we get a palindrome (210101141101012).

The spelling of 210001021001000 in words is "two hundred ten trillion, one billion, twenty-one million, one thousand".