1211004343131 has 16 divisors (see below), whose sum is σ = 1761513775488. Its totient is φ = 733919979200.

The previous prime is 1211004343121. The next prime is 1211004343151. The reversal of 1211004343131 is 1313434001121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1211004343131 - 2²³ = 1210995954523 is a prime.

It is a super-2 number, since 2×1211004343131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211004343121) 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, 599920 + ... + 1667906.

It is an arithmetic number, because the mean of its divisors is an integer number (110094610968).

Almost surely, 2^{1211004343131} is an apocalyptic number.

1211004343131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211004343131 is a deficient number, since it is larger than the sum of its proper divisors (550509432357).

1211004343131 is a wasteful number, since it uses less digits than its factorization.

1211004343131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102362.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1211004343131 its reverse (1313434001121), we get a palindrome (2524438344252).

The spelling of 1211004343131 in words is "one trillion, two hundred eleven billion, four million, three hundred forty-three thousand, one hundred thirty-one".