1211030021210 has 16 divisors (see below), whose sum is σ = 2204346781800. Its totient is φ = 478969176576.

The previous prime is 1211030021171. The next prime is 1211030021213. The reversal of 1211030021210 is 121200301121.

It can be written as a sum of positive squares in 4 ways, for example, as 914182664641 + 296847356569 = 956129^2 + 544837^2 .

It is not an unprimeable number, because it can be changed into a prime (1211030021213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680353055 + ... + 680354834.

Almost surely, 2^{1211030021210} is an apocalyptic number.

1211030021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211030021210 is a deficient number, since it is larger than the sum of its proper divisors (993316760590).

1211030021210 is a wasteful number, since it uses less digits than its factorization.

1211030021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360707985.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1211030021210 its reverse (121200301121), we get a palindrome (1332230322331).

The spelling of 1211030021210 in words is "one trillion, two hundred eleven billion, thirty million, twenty-one thousand, two hundred ten".