1221000131130 has 32 divisors (see below), whose sum is σ = 3155815724544. Its totient is φ = 300553878336.

The previous prime is 1221000131101. The next prime is 1221000131191. The reversal of 1221000131130 is 311310001221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1565384394 + ... + 1565385173.

It is an arithmetic number, because the mean of its divisors is an integer number (98619241392).

Almost surely, 2^{1221000131130} is an apocalyptic number.

1221000131130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221000131130 is an abundant number, since it is smaller than the sum of its proper divisors (1934815593414).

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

1221000131130 is a wasteful number, since it uses less digits than its factorization.

1221000131130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130769590.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1221000131130 its reverse (311310001221), we get a palindrome (1532310132351).

The spelling of 1221000131130 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-one thousand, one hundred thirty".