1211021000210 has 64 divisors (see below), whose sum is σ = 2576908512000. Its totient is φ = 409519345536.

The previous prime is 1211021000197. The next prime is 1211021000221. The reversal of 1211021000210 is 120001201121.

It is a junction number, because it is equal to n+sod(n) for n = 1211021000191 and 1211021000200.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2167880 + ... + 2668659.

It is an arithmetic number, because the mean of its divisors is an integer number (40264195500).

Almost surely, 2^{1211021000210} is an apocalyptic number.

1211021000210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211021000210 is an abundant number, since it is smaller than the sum of its proper divisors (1365887511790).

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

1211021000210 is an equidigital number, since it uses as much as digits as its factorization.

1211021000210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836640 (or 4836626 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1211021000210 its reverse (120001201121), we get a palindrome (1331022201331).

The spelling of 1211021000210 in words is "one trillion, two hundred eleven billion, twenty-one million, two hundred ten", and thus it is an aban number.