1211222012210 has 32 divisors (see below), whose sum is σ = 2491949601792. Its totient is φ = 415227303360.

The previous prime is 1211222012071. The next prime is 1211222012213. The reversal of 1211222012210 is 122102221121.

It is not an unprimeable number, because it can be changed into a prime (1211222012213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414701 + ... + 1610720.

It is an arithmetic number, because the mean of its divisors is an integer number (77873425056).

Almost surely, 2^{1211222012210} is an apocalyptic number.

1211222012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211222012210 is an abundant number, since it is smaller than the sum of its proper divisors (1280727589582).

1211222012210 is a wasteful number, since it uses less digits than its factorization.

1211222012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033978.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211222012210 its reverse (122102221121), we get a palindrome (1333324233331).

The spelling of 1211222012210 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, twelve thousand, two hundred ten".