1221130115151 has 16 divisors (see below), whose sum is σ = 1629666215520. Its totient is φ = 813340569600.

The previous prime is 1221130115143. The next prime is 1221130115171. The reversal of 1221130115151 is 1515110311221.

It is not a de Polignac number, because 1221130115151 - 2³ = 1221130115143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221130115141) 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, 32020671 + ... + 32058783.

It is an arithmetic number, because the mean of its divisors is an integer number (101854138470).

Almost surely, 2^{1221130115151} is an apocalyptic number.

1221130115151 is a deficient number, since it is larger than the sum of its proper divisors (408536100369).

1221130115151 is a wasteful number, since it uses less digits than its factorization.

1221130115151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47626.

The product of its (nonzero) digits is 300, while the sum is 24.

Adding to 1221130115151 its reverse (1515110311221), we get a palindrome (2736240426372).

The spelling of 1221130115151 in words is "one trillion, two hundred twenty-one billion, one hundred thirty million, one hundred fifteen thousand, one hundred fifty-one".