1221230131134 has 16 divisors (see below), whose sum is σ = 2630341821072. Its totient is φ = 375763117248.

The previous prime is 1221230131133. The next prime is 1221230131153. The reversal of 1221230131134 is 4311310321221.

It is a super-2 number, since 2×1221230131134² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221230131133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7828398199 + ... + 7828398354.

It is an arithmetic number, because the mean of its divisors is an integer number (164396363817).

Almost surely, 2^{1221230131134} is an apocalyptic number.

1221230131134 is an abundant number, since it is smaller than the sum of its proper divisors (1409111689938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221230131134 is a wasteful number, since it uses less digits than its factorization.

1221230131134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15656796571.

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

Adding to 1221230131134 its reverse (4311310321221), we get a palindrome (5532540452355).

The spelling of 1221230131134 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, one hundred thirty-one thousand, one hundred thirty-four".