1213540231151 has 2 divisors, whose sum is σ = 1213540231152. Its totient is φ = 1213540231150.

The previous prime is 1213540231147. The next prime is 1213540231207. The reversal of 1213540231151 is 1511320453121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213540231151 - 2² = 1213540231147 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213540231951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606770115575 + 606770115576.

It is an arithmetic number, because the mean of its divisors is an integer number (606770115576).

Almost surely, 2^{1213540231151} is an apocalyptic number.

1213540231151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213540231151 is an equidigital number, since it uses as much as digits as its factorization.

1213540231151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 1213540231151 its reverse (1511320453121), we get a palindrome (2724860684272).

The spelling of 1213540231151 in words is "one trillion, two hundred thirteen billion, five hundred forty million, two hundred thirty-one thousand, one hundred fifty-one".