1021211211000 has 256 divisors, whose sum is σ = 3274604910720. Its totient is φ = 264775680000.

The previous prime is 1021211210933. The next prime is 1021211211011. The reversal of 1021211211000 is 1121121201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 230988790 + ... + 230993210.

Almost surely, 2^{1021211211000} is an apocalyptic number.

1021211211000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021211211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1637302455360).

1021211211000 is an abundant number, since it is smaller than the sum of its proper divisors (2253393699720).

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

1021211211000 is a wasteful number, since it uses less digits than its factorization.

1021211211000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563 (or 6549 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1021211211000 its reverse (1121121201), we get a palindrome (1022332332201).

The spelling of 1021211211000 in words is "one trillion, twenty-one billion, two hundred eleven million, two hundred eleven thousand".