1221432246125 has 128 divisors (see below), whose sum is σ = 1889190051840. Its totient is φ = 767763360000.

The previous prime is 1221432246109. The next prime is 1221432246131. The reversal of 1221432246125 is 5216422341221.

It is not a de Polignac number, because 1221432246125 - 2⁴ = 1221432246109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1340759420 + ... + 1340760330.

It is an arithmetic number, because the mean of its divisors is an integer number (14759297280).

Almost surely, 2^{1221432246125} is an apocalyptic number.

It is an amenable number.

1221432246125 is a deficient number, since it is larger than the sum of its proper divisors (667757805715).

1221432246125 is a wasteful number, since it uses less digits than its factorization.

1221432246125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636 (or 1626 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

Adding to 1221432246125 its reverse (5216422341221), we get a palindrome (6437854587346).

The spelling of 1221432246125 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-two million, two hundred forty-six thousand, one hundred twenty-five".