1211012001210 has 128 divisors (see below), whose sum is σ = 3206222383104. Its totient is φ = 290293436160.

The previous prime is 1211012001187. The next prime is 1211012001217. The reversal of 1211012001210 is 121002101121.

It is not an unprimeable number, because it can be changed into a prime (1211012001217) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22984917 + ... + 23037543.

It is an arithmetic number, because the mean of its divisors is an integer number (25048612368).

Almost surely, 2^{1211012001210} is an apocalyptic number.

1211012001210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211012001210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603111191552).

1211012001210 is an abundant number, since it is smaller than the sum of its proper divisors (1995210381894).

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

1211012001210 is a wasteful number, since it uses less digits than its factorization.

1211012001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53428.

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

Adding to 1211012001210 its reverse (121002101121), we get a palindrome (1332014102331).

The spelling of 1211012001210 in words is "one trillion, two hundred eleven billion, twelve million, one thousand, two hundred ten".