1221231111410 has 32 divisors (see below), whose sum is σ = 2208114387072. Its totient is φ = 486294232320.

The previous prime is 1221231111323. The next prime is 1221231111433. The reversal of 1221231111410 is 141111321221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6869909 + ... + 7045431.

It is an arithmetic number, because the mean of its divisors is an integer number (69003574596).

Almost surely, 2^{1221231111410} is an apocalyptic number.

1221231111410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221231111410 is a deficient number, since it is larger than the sum of its proper divisors (986883275662).

1221231111410 is a wasteful number, since it uses less digits than its factorization.

1221231111410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178658.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 1221231111410 its reverse (141111321221), we get a palindrome (1362342432631).

The spelling of 1221231111410 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, one hundred eleven thousand, four hundred ten".